~karl-schock/ubuntu-desktop-course/ubuntu-desktop-course-german

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://docbook.org/xml/4.2/docbookx.dtd">
<chapter>
		<title>Benutzung des Internet</title>
		<para><emphasis role="strong">Lernziele</emphasis></para>
		<para>In dieser Unterrichtseinheit lernen Sie, wie Sie</para>
		<itemizedlist>
			<listitem><para>sich mit dem Internet verbinden.</para></listitem>
			<listitem><para>im Web surfen.</para></listitem>
			<listitem><para>auf verschiedene Nachrichtenquellen zugreifen.</para></listitem>
			<listitem><para>E-Mail senden und empfangen.</para></listitem>
			<listitem><para>verschiedene Programme für das Instant Messaging benutzen.</para></listitem>
			<listitem><para>mit so genannten Softphones telefonieren.</para></listitem>
		</itemizedlist>
		<instructornote><title>Hinweis für die Lehrkraft:</title><para><emphasis role="italic">Es ist zu
		empfehlen, alle Themen dieser Unterrichtseinheit zu behandeln. Wenn aber die Zeit dazu zu knapp ist,
		dann können Sie die folgenden optionalen Themen weglassen: Verwendung einer Einwahlverbindung,
		Verwendung eines alternativen E-Mail Clients und WengoPhone.</emphasis></para>
		</instructornote>
		<sect1>
			<title>Verbindung mit dem Internet und Verwendung des Internet</title>
			<para>Das Internet wird täglich von Millionen von Menschen bei der Arbeit und in der
			Freizeit verwendet. Es wird weltweit nach Informationen gesucht, mit Menschen aus dem
			Freundeskreis oder der Verwandtschaft korrespondiert, an Diskussionsforen teilgenommen,
			Nachrichten gelesen, gespielt. Nie war das alles einfacher als heute... und obendrein
			noch leicht zu benutzen.</para>
			<para>Die Möglichkeit, Zugang zum Internet zu haben, steht aber nicht allen offen, sondern
			hängt ganz entscheidend davon ab, wo jemand lebt und/oder arbeitet und wie die dort vorhandene
			Infrastruktur ist. Die Voraussetzungen für einen Internet Zugang sind ein Vertrag mit einem
			Internet Service Provider (ISP) und eine funktionierende Internetanbindung dort, wo man
			lebt/arbeitet. Die Konfiguration der Internet Anbindung ist nicht schwer.
			Ubuntu unterstützt die meisten Anbindungsarten, die in dieser Lektion behandelt werden:
			Breitband (über Kabel oder ASDL), Einwahl und Direktzugang über ein Local Area Network
			(LAN).</para>
			<tip><title><emphasis role="strong">Gut zu wissen:</emphasis></title>
			<para>Breitband bedeutet entweder Asymmetric Digital Subscriber Line (ADSL) oder eine Verbindung
			über einen Kabel-TV-Anschluss.</para> 
			<para>Bei DSL-Modems (PPPoE) wird ein DSL-Modem über ein Ethernet Netzwerkkabel mit dem Computer
			verbunden. Das Modem kann also nur zusammen mit einer Breitband DSL Verbindung benutzt
			werden.</para>
			<para>Einwahl bedeutet Telefon Einwahl Verbindungen. Sie sind begrenzt auf 56 KBit/s
			oder weniger.</para> 
			<para>Ein Local Area Network (LAN) wird über Ethernet oder drahtlos per Funk realisiert und wird
			in der Regel immer zusammen mit einer Breitband Anbindung verwendet.</para>
			<para>Mobiltelefone ermöglichen eine Anbindung prinzipiell wie eine Telefon Einwahl
			Verbindung mit einem Modem, da in modernen Handys meist ein Modem integriert ist.</para></tip>
			<para>Breitband Anbindungen sind schnelle und zuverlässige Verbindungen, für die in der Regel
			eine feste monatliche Gebühr (die so genannte Flat-Rate) zu zahlen ist. Firmen, die Breitband
			Zugänge anbieten, haben meist mehrere Angebote mit unterschiedlichen Bandbreiten im Programm.
			Wenn Sie auf Reisen einen Internet Zugang benötigen, dann können Sie sich einen drahtlosen
			Internet Zugang zulegen. Ist in Ihrem Computer noch keine drahtlose Netzwerkkarte eingebaut,
			dann müssen Sie eine entsprechende Karte installieren. Eine solche Anbindung an das Internet ist
			vergleichbar mit einer Satelliten Verbindung, bei der die Daten mit elektromagnetischen
			Wellen übertragen werden.</para>
			<para>Einwahl Verbindungen verwenden die gleichen Leitungen wie Ihre Telefon Verbindungen,
			mit der einzigen Ausnahme, dass die beiden "Gesprächsteilnehmer"  Computer sind. Es ist eine
			langsame und preiswerte Möglichkeit, bei der die Verbindung zum Server vor Ort über eine
			Telefonleitung hergestellt wird. Ihr Computer wählt eine Telefonnummer, die von Ihrem ISP
			bereitgestellt wird und verbindet sich darüber mit dem Server. Das hat zur Folge, dass Sie
			keine Telefongespräche führen können, während Sie mit dem Internet verbunden sind. Dies ist
			die älteste und langsamste Möglichkeit, sich mit dem Internet zu verbinden. Vieles, was heute
			im Internet möglich ist, erweist sich bei einer solchen langsamen Anbindung jedoch meist als
			sehr langatmig und darum oft frustrierend.</para>
			<sect2>
				<title>Kabelnetzwerkverbindung</title>
			<para>Die Kabelnetzwerkverbindung bei Ubuntu ist ein einfach zu bedienendes und mächtiges Programm, um den Computer mittels (drahtlosen) Netzwerkadaptern mit einem Netzwerk zu verbinden. Das Programm befindet sich im oberen Panel rechts außen.
			Ein Rechtsklick zeigt an, ob Ihr Computer bereits mit einem (drahtlosen) Netzwerk verbunden ist. Im Falle eines drahtlosen Netzwerks, das durch ein Passwort geschützt ist, erscheint ein Dialog, in dem das Passwort abgefragt wird.
			Das Passwort können Sie auch Ihrem 'Schlüsselbund' hinzufügen, damit es bei Bedarf automatisch verwendet wird. Dann werden Sie unter Umständen nach Ihrem 'Schlüsselbund'-Passwort gefragt, um sich abzumelden.</para> 
			<figure id="fig:network-manager"><title><emphasis role="italic">Kabelnetzwerkverbindung</emphasis></title>
				<mediaobject><imageobject>
					<imagedata fileref="images/Lesson04_images_001.png" format="PNG" />
				</imageobject></mediaobject>
			</figure>
			<para>Mit einem Rechtsklick auf die Kabelnetzwerkverbindung können Sie (drahtlose) Netzwerkverbindungen auch aktivieren und deaktivieren.
			Die Verbindungsinformationen ermöglichen den Zugriff auf die Netzwerkeinstellungen, die im Augenblick verwendet werden.</para>
			<figure id="fig:network-manager-connection"><title><emphasis role="italic">Kabelnetzwerkverbindung Verbindungsinformationen</emphasis></title>
				<mediaobject><imageobject>
					<imagedata fileref="images/Lesson04_images_002.png" format="PNG" />
				</imageobject></mediaobject>
			</figure>
			<para>Wenn die Kabelnetzwerkverbindung Ihre Netzwerkverbindungen nicht automatisch konfiguriert, dann haben Sie ersatzweise die Möglichkeit, sie manuell zu konfigurieren.</para>
			</sect2>
			<sect2>
				<title>Verwendung einer Netzwerkverbindung</title>
				<para>So verbinden Sie sich unter Verwendung einer Netzwerkverbindung mit dem Internet:</para>
				<orderedlist numeration="arabic">
					<listitem><para>Wählen Sie im Menü <emphasis role="strong">System</emphasis> den Eintrag
					<emphasis role="strong">Systemverwaltung</emphasis> und klicken Sie auf
					<emphasis role="strong">Netzwerk</emphasis>. Das
					<emphasis role="strong">Netzwerkeinstellungen</emphasis> Fenster erscheint.</para>
					<figure id="fig:network-menu"><title><emphasis role="italic">Aufruf der Netzwerkeinstellungen</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_003.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					
					</listitem>
					<listitem><para>Wählen Sie im Register <emphasis role="strong">Verbindungen</emphasis>
					die Verbindung aus, die verwendet werden soll. Klicken Sie auf <emphasis role="strong">Eigenschaften</emphasis>. 						Das <emphasis role="strong">eth0 Properties</emphasis> Fenster erscheint.</para>
					<figure id="fig:network-settings"><title><emphasis role="italic">Netzwerkeinstellungen</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_004.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>Entfernen Sie die Markierung bei der <emphasis role="strong">Roaming-Modus aktivieren</emphasis>
					Checkbox, um die Verbindung zu aktivieren.</para>
					<note><title><emphasis role="strong">Anmerkung:</emphasis></title>
					<para>Ihr Internet Service Provider (ISP) oder IhrE Netzwerk AdministratorIn sollte Ihnen 
					die IP-Adresse, Subnetzmaske und Gateway-Adresse nennen, die Sie bei den Connection
                                        Settings eingeben müssen.</para></note>
					<orderedlist numeration="loweralpha">
						<listitem>
							<para>Wählen Sie im Feld <emphasis role="strong">Konfiguration</emphasis>
							die Option <emphasis role="strong">Statische IP-Adresse</emphasis>
							aus.</para>
							</listitem>
							<listitem><para>Geben Sie die IP-Adresse Ihres Computers im Feld
							<emphasis role="strong">IP-Adresse</emphasis> ein.</para></listitem>
							<listitem><para>Geben Sie die Subnetzmaske, die zur IP-Adresse Ihres
							Computers gehört, im Feld <emphasis role="strong">Subnetzmaske</emphasis>
							ein.</para>
							<note><title><emphasis role="strong">Anmerkung:</emphasis></title>
							<para>Eine Subnetzmaske unterteilt einen Bereich von IP-Adressen
							in Gruppen, um so das Weiterleiten von Daten zu
							ermöglichen.</para></note></listitem>
							<listitem><para>Geben Sie die IP-Adresse Ihres ISP im Feld
							<emphasis role="strong">Gateway-Adresse</emphasis> ein.</para>
							<note><title><emphasis role="strong">Anmerkung:</emphasis></title>
							<para>Ein Gateway ist ein Gerät, das Benutzer(innen) mit dem Internet verbindet.
							Es wird vom ISP bereitgestellt.</para></note>
							<figure id="fig:eth0"><title><emphasis role="italic">eth0 Properties</emphasis></title>
								<mediaobject><imageobject>
									<imagedata fileref="images/Lesson04_images_005.png" format="PNG" />
								</imageobject></mediaobject>
							</figure>
							</listitem>
						</orderedlist>
					</listitem>
					<listitem><para>Klicken Sie auf <emphasis role="strong">OK</emphasis>, um die
					Konfiguration der kabelgebundenen Verbindung abzuschließen.</para>
						<figure><title><emphasis role="italic">Netzwerkeinstellungen</emphasis></title>
							<mediaobject><imageobject>
								<imagedata fileref="images/Lesson04_images_006.png" format="PNG" />
							</imageobject></mediaobject>
						</figure> 
					<para>Jetzt können Sie die kabelgebundene Verbindung verwenden, um sich mit dem Internet zu verbinden.</para>
				</listitem>
				</orderedlist>
			</sect2>
			<sect2>
				<title>Verwendung einer drahtlosen Netzwerkkarte</title>
				<para>Ubuntu aktiviert automatisch die Unterstützung für zahlreiche drahtlose Netzwerkkarten. So stellen Sie fest,
				ob Ubuntu die drahtlose Netzwerkkarte Ihres Computers unterstützt:</para>
				<orderedlist numeration="arabic">
					<listitem><para>Wählen Sie im Menü <emphasis role="strong">System</emphasis> den
					Eintrag <emphasis role="strong">Systemverwaltung</emphasis> und klicken Sie auf
					<emphasis role="strong">Netzwerk</emphasis>. Das
                                        <emphasis role="strong">Netzwerkeinstellungen</emphasis> Fenster
                                        erscheint.</para></listitem>
					<listitem><para>Wenn die drahtlose Netzwerkkarte Ihres Computers aufgeführt wird, dann können Sie genau so
					vorgehen, wie im Abschnitt <emphasis role="strong">Verwendung einer Netzwerkverbindung</emphasis>
					beschrieben, um sich mit dem Internet zu verbinden.</para>
					<figure id="fig:wireless"><title><emphasis role="italic">Auswahl einer drahtlosen Funkverbindung</emphasis></title>
				<mediaobject><imageobject>
					<imagedata fileref="images/Lesson04_images_007.png" format="PNG" />
					</imageobject></mediaobject>
				</figure>
				<para>Alternativ können Sie mit links auf die Kabelnetzwerkverbindung klicken und sich über
                                      alle in Reichweite befindlichen drahtlosen Netzwerke informieren.</para>
				</listitem>
				</orderedlist>
				<tip><title><emphasis role="strong">Gut zu wissen:</emphasis></title>
				<para>Eine komplette Liste aller von Ubuntu unterstützten drahtlosen Netzwerkkarten
                                finden Sie unter 
				<ulink url="https://help.ubuntu.com/community/WifiDocs/WirelessCardsSupported">https://help.ubuntu.com/community/WifiDocs/WirelessCardsSupported</ulink></para></tip>
				<para>Einige drahtlose Netzwerkkarten werden nicht auf der Ubuntu Webseite aufgeführt, weil
				es dafür keine Open Source Treiber gibt. Darum werden diese Netzwerkkarten nicht automatisch
				von Ubuntu unterstützt. Wenn es für Ihre drahtlose Netzwerkkarte keine Open Source Treiber
				gibt, dann können Sie Ndiswrapper verwenden, um die Netzwerkkarte benutzen zu können.</para>
				<para><emphasis role="strong">Verwendung von Ndiswrapper zusammen mit einer drahtlosen
                                Netzwerkkarte</emphasis></para>
				<para>Ndiswrapper ist ein Linux Modul, das es Ubuntu ermöglicht, Microsoft Windows Treiber für drahtlose Netzwerkkarten zu verwenden.
				Das Programm 'Windows Wireless Drivers' zur Konfiguration von Ndiswrapper kann bequem über
                                <emphasis role="strong">Anwendungen Hinzufügen/Entfernen</emphasis> installiert werden.
                                Das <emphasis role="strong">Windows WLAN Treiber</emphasis> Einrichtungsprogramm findet sich
                                nach der Installation in <emphasis role="strong">System Systemverwaltung</emphasis>.</para>
			</sect2>
			<sect2>
				<title>Verwendung einer Einwahlverbindung</title>
				<para>Bei einer Einwahlverbindung wird ein Modem verwendet, um sich mit dem Internet zu
                                verbinden. Sie können das Programm ScanModem benutzen, 
				um den Modem-Typ zu ermitteln. Das Programm erkennt den Modem-Typ -
				ob es ein Peripheral Component Interconnect (PCI) oder ein Universal
				Serial Bus (USB) Modem ist. </para>
				<tip><title><emphasis role="strong">Gut zu wissen:</emphasis></title>
				<para>Das Programm ScanModem können Sie von folgender Seite herunterladen:
				<ulink url="https://help.ubuntu.com/community/DialupModemHowto/ScanModem">https://help.ubuntu.com/community/DialupModemHowto/ScanModem</ulink></para></tip>
				<para>So verwenden Sie eine Einwahlverbindung:</para>
				<orderedlist numeration="arabic">
					<listitem><para>Laden Sie einen Treiber für Ihr Modem herunter, konfigurieren und
                                        installieren Sie anschließend diesen Treiber. Wenn es keinen Open Source Treiber
                                        gibt, dann wenden Sie sich an die/den VerkäuferIn des Modems und fragen Sie nach
                                        anderen Alternativen.</para>
					<note><title><emphasis role="strong">Anmerkung:</emphasis></title>
					<para>Open Source Treiber zum Herunterladen finden Sie auf der Seite 
					<ulink url="www.modemdriver.com">www.modemdriver.com</ulink>.</para></note>
					</listitem>
					<listitem><para>Konfigurieren Sie die Einwahlverbindung zu Ihrem ISP:</para>
						<orderedlist numeration="arabic">
							<listitem><para>Wählen Sie im Menü <emphasis role="strong">System</emphasis>
							den Eintrag <emphasis role="strong">Systemverwaltung</emphasis>
							und klicken Sie auf <emphasis role="strong">Netzwerk</emphasis>. Das
							<emphasis role="strong">Netzwerkeinstellungen</emphasis> Fenster
							erscheint.</para></listitem>
							<listitem><para>Wählen Sie im
                                                        <emphasis role="strong">Netzwerkeinstellungen</emphasis>
							Fenster <emphasis role="strong">Modem-Verbindung</emphasis> aus
							und klicken Sie auf
                                                        <emphasis role="strong">Eigenschaften.</emphasis> Das
							<emphasis role="strong">ppp0 Properties</emphasis>
							Fenster erscheint.</para>
						<figure id="fig:modem"><title><emphasis role="italic">Netzwerkeinstellungen</emphasis></title>
							<mediaobject><imageobject>
								<imagedata fileref="images/Lesson04_images_009.png" format="PNG" />
							</imageobject></mediaobject>
						</figure>
							</listitem>
							<listitem><para>Markieren Sie
                                                        im <emphasis role="strong">ppp0 Properties</emphasis> Fenster
							die Checkbox
                                                        <emphasis role="strong">Diese Verbindung aktivieren</emphasis>,
							um die Verbindung zu aktivieren.</para></listitem>
						</orderedlist>
						
						<orderedlist numeration="loweralpha">
							<listitem><para>Tragen Sie die Daten Ihres
                                                        Internet-Dienstanbieters (ISP) und Ihre Kontodaten ein,
							die Ihr ISP Ihnen mitgeteilt hat.</para>
							<para>Tragen Sie die Telefonnummer in das Feld
                                                        <emphasis role="strong">Telefonnummer</emphasis>
							und die Vorwahl in das Feld
                                                        <emphasis role="strong">Vorwahl</emphasis> ein,
							die das Modem wählen soll, um sich mit dem Server zu verbinden.
                                                        Geben Sie Ihren Einwahl Benutzernamen im Feld
							<emphasis role="strong">Benutzername</emphasis> und das
							Passwort im Feld <emphasis role="strong">Passwort</emphasis>
							ein. Der Benutzername ist der, unter dem Sie bei Ihrem ISP
                                                        registriert sind.</para>
							</listitem>
							<listitem><para>Tragen Sie die Modem Settings im Register Modem ein. Klicken Sie dazu auf das Register
							<emphasis role="strong">Modem</emphasis>. Geben Sie den Modemanschluss ein oder wählen Sie ihn im Feld
							<emphasis role="strong">Modemanschluss</emphasis> aus. Wählen Sie das Wahlverfahren im Feld
							<emphasis role="strong">Wahlverfahren</emphasis> aus. Sie können die Art des Wahlverfahrens, 
							die verwendet werden soll, im Feld <emphasis role="strong">Wahlverfahren</emphasis> festlegen.
                                                        Die Art des Wahlverfahrens ist abhängig von Ihrer Telefongesellschaft
							und ist entweder <emphasis role="strong">Ton</emphasis> oder
							<emphasis role="strong">Puls</emphasis>. Wenn Sie nicht wissen, welches Wahlverfahren Sie auswählen sollen,
							dann fragen Sie das bei Ihrer Telefongesellschaft nach.
                                                        Unabhängig von der Art des Wahlverfahrens gibt das Modem Geräusche von sich,
							während es sich mit dem Server des ISP verbindet. Sie können die Lautstärke dieser Geräusche regulieren, in dem Sie eine 
							entsprechende Lautstärke Option im Feld <emphasis role="strong">Lautstärke</emphasis> auswählen. Es ist ratsam, hier <emphasis role="strong">Aus</emphasis> oder
							<emphasis role="strong">Leise</emphasis> auszuwählen.</para>
							</listitem>
							<listitem><para>Legen Sie die Connection Settings fest. Klicken Sie
							auf das Register <emphasis role="strong">Optionen</emphasis> und markieren Sie die <emphasis role="strong">Modem
							als Vorgaberoute ins Internet verwenden</emphasis> Checkbox, um die Modem Einwahlverbindung als
							Standard Internet Verbindung festzulegen. Wenn Sie ein Laptop in einem lokalen Netzwerk (Local Area Network, LAN) verwenden, dann entfernen Sie die Markierung
							bei der <emphasis role="strong">Modem als Vorgaberoute ins Internet
                                                        verwenden</emphasis> Checkbox. Markieren Sie diese Option nur, wenn Sie eine
							Einwahlverbindung verwenden.</para>
							<para>Die Konfiguration einer Modem Einwahlverbindung beinhaltet,
                                                        dass Sie in der Lage sind, einen Rechnernamen in eine IP-Adresse
                                                        aufzulösen, um mit dem Rechner per TCP/IP kommunizieren zu können. 
							Sie können den Server Ihres ISP damit beauftragen, diese Arbeit der
                                                        Namensauflösung zu übernehmen und zu Rechnernamen die zugehörigen
                                                        IP-Adressen zu ermitteln.
							Markieren Sie dazu die <emphasis role="strong">Den Namens-Server
                                                        des Internet-Dienstanbieter verwenden</emphasis> Checkbox.</para>
							<para>Sollte die Verbindung mit dem Internet einmal abbrechen, dann
                                                        wird Ihr Modem automatsich versuchen, die Verbindung mit dem
                                                        Internet wieder herzustellen, wenn die
							<emphasis role="strong">Erneut versuchen, wenn die Verbindung 
							unterbrochen wird oder fehlschlägt</emphasis> Checkbox markiert
                                                        ist.</para></listitem>
							<listitem><para>Klicken Sie auf <emphasis role="strong">OK</emphasis>, um die Konfiguration der Einwahlverbindung abzuschliessen.</para>
							<figure><title><emphasis role="italic">pppo Properties</emphasis></title>
							<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_010.png" format="PNG" />
							</imageobject></mediaobject>
							</figure>
					</listitem>
						</orderedlist>
					</listitem>
				</orderedlist>
				<para>Jetzt können Sie die Einwahlverbindung verwenden, um sich mit dem Internet zu verbinden.</para>
			
				<instructornote><title>Hinweis für die Lehrkraft:</title><para><emphasis role="italic">Wenn die Teilnehmer(innen) sich unter Verwendung eines Modems mit dem Internet verbinden müssen, das in einem
				Mobiltelefon integriert ist oder eine Point-to-Point (PPP) Einwahlverbindung mit einem
                                Bluetooth-kompatiblen Mobiltelefon einrichten müssen, dann verweisen Sie auf folgende
				Seite: <ulink url="https://help.ubuntu.com/community/BluetoothDialup">https://help.ubuntu.com/community/BluetoothDialup</ulink></emphasis></para>
				<para><emphasis role="italic">Um sich mit einem Mobiltelefon über ein USB Kabel mit dem
                                Internet zu verbinden, verweisen Sie auf die Seite
				<ulink url="https://help.ubuntu.com/community/CableDialup">https://help.ubuntu.com/community/CableDialup</ulink></emphasis></para>
				</instructornote>
			</sect2>
		</sect1>
		<sect1>
			<title>Browsing the Web</title>
			<para>Mozilla Firefox is the default Web browsing client on Ubuntu. It is open sourced, developed by the Mozilla Corporation and many 
			external contributors and is fully compatible with Ubuntu. To open a Firefox Web browser, on the
			<emphasis role="strong">Applications</emphasis> menu, point to <emphasis role="strong">Internet</emphasis>
			and click <emphasis role="strong">Firefox Web Browser</emphasis>.
			<figure><title><emphasis role="italic">Launching Firefox Web Browser</emphasis></title>
				<mediaobject><imageobject>
					<imagedata fileref="images/Lesson04_images_011.png" format="PNG" />
				</imageobject></mediaobject>
			</figure>
			</para>
			<para>In addition to typical Web browser features, Firefox includes two powerful features that make your
			online experience more productive - an integrated search system and live bookmarking.</para>
			<instructornote><title>Instructor Notes:</title><para><emphasis role="italic">Ask students to open this browser and try performing a search.</emphasis></para>
			</instructornote>
			<para><emphasis role="strong">Integrated Search</emphasis></para>
			<para>Firefox includes an integrated search feature that enables you to search for and find any information.
			The Search bar comes pre-loaded with search engines for Google, Yahoo!, Amazon, eBay, Answers.com and
			Creative Commons. You can enter a search term in the Search bar and receive immediate answers from the
			search engine you choose. You can select a new search engine from the Search bar menu at any time and add
			search engines from favourite Web sites.
			<figure><title><emphasis role="italic">Available Search Engines</emphasis></title>
				<mediaobject><imageobject>
					<imagedata fileref="images/Lesson04_images_012.png" format="PNG" />
				</imageobject></mediaobject>
			</figure>
			</para>
			<para><emphasis role="strong">Search Suggestions</emphasis></para>
			<para>To further ease your search-related tasks, some search engines such as Google, Yahoo and Answers.com
			in Firefox, suggest search terms. Begin typing into the Search bar and a list of suggestions will
			appear.</para>
			<para>For example, if you type <emphasis role="strong">king</emphasis> in the Search bar, a list of
			suggestions to complete your search keyword is displayed. So instead of typing the complete term, you
			can select the required term from the list. This makes the search easy and quick.</para>
			<para>The following graphic shows a list of suggestions, when you start typing in the Search bar:</para>
			<figure><title><emphasis role="italic">List of Suggestions</emphasis></title>
				<mediaobject><imageobject>
					<imagedata fileref="images/Lesson04_images_013.png" format="PNG" />
				</imageobject></mediaobject>
			</figure>
			<para><emphasis role="strong">Live Bookmarks</emphasis></para>
			<para>If you come across an interesting Web site over the Internet and would like to keep it for future
			reference, without trying to remember the URL, create a bookmark. The next time you are online,
			simply click the link to go to that Web page. You can view Web feeds such as news and blog headlines
			in the bookmarks toolbar or menu. A Web feed or feed is an XML Web page that contains a list of links
			to other Web pages. You can quickly review the latest headlines from your favourite sites and click to
			go directly to chapters of interest.</para>
			<note><title><emphasis role="strong">Note:</emphasis></title>
			<para>A Bookmark in Firefox, similar to favourites in Internet
			Explorer, is a useful browser feature.</para></note>
			<para>To create a live bookmark in Firefox:</para>
			<orderedlist numeration="arabic">
				<listitem><para>Open the Firefox Web browser. On the <emphasis role="strong">Bookmarks</emphasis> menu, click <emphasis role="strong">Organise Bookmarks</emphasis>.</para> 
				<para>The <emphasis role="strong">Bookmarks Manager</emphasis> window will be displayed.</para>
				<figure><title><emphasis role="italic">Organising Bookmarks</emphasis></title>
					<mediaobject><imageobject>
						<imagedata fileref="images/Lesson04_images_014.png" format="PNG" />
					</imageobject></mediaobject>
				</figure>
				</listitem>
				<listitem><para>On the <emphasis role="strong">File</emphasis> menu, click <emphasis role="strong">New
				Live Bookmark</emphasis>. The <emphasis role="strong">Properties for New Bookmark</emphasis>
				dialogue box will be displayed.</para>
				<figure><title><emphasis role="italic">Adding Live Bookmarks</emphasis></title>
					<mediaobject><imageobject>
						<imagedata fileref="images/Lesson04_images_015.png" format="PNG" />
					</imageobject></mediaobject>
				</figure>
				</listitem>
				<listitem><para>In the <emphasis role="strong">Name</emphasis> box, type the name you want to give to the
				feed. Make sure that the name reflects the contents of the Web site and includes enough information
				to uniquely identify the data file. Type the feed location-the URL of the feed in the <emphasis role="strong">Feed Location</emphasis>
				box and the description of the feed in the <emphasis role="strong">Description</emphasis> box. If
				you want, you can skip giving the description, though these can be used to categorise various feeds
				under groups. Click <emphasis role="strong">OK</emphasis> and close the <emphasis role="strong">
				Bookmarks Manager</emphasis> window. This sets the bookmark.</para>
				<figure><title><emphasis role="italic">Viewing Bookmark Properties</emphasis></title>
					<mediaobject><imageobject>
						<imagedata fileref="images/Lesson04_images_016.png" format="PNG" />
					</imageobject></mediaobject>
				</figure>
				</listitem>
				<listitem><para>In the Firefox Web browser, on the <emphasis role="strong">Bookmarks</emphasis> menu,
				point to <emphasis role="strong">New Live Bookmark</emphasis>. This displays the list of feeds, their
				respective locations and description. To locate the one you are looking for, you can sort this
				list on name, location or description. Just click the one you want to quickly browse through.
				It opens in the Mozilla Firefox window.</para>
				</listitem>
			</orderedlist>
			</sect1>
			<sect1>
			<title>Accessing News</title>
			<para>News can be retrieved from the Internet in different ways. Using Usenet and RSS for access is covered below.</para>
			<para>Newsgroups are online notice boards where people post comments and discuss subjects of mutual interest. They are technically distinct from, 
			but functionally similar to discussion forums on the World Wide Web.  Anyone can participate in the discussion and post thoughts. At the rate at which newsgroups 
			are growing, it is safe to say that there are groups covering most subjects imaginable; from computers to social issues, pet advice, literature and science,
			job postings and housing to rent etc.
			It is a fast and easy way to communicate, share views and advertise to people all over the world. Newsreaders are the applications used to access newsgroups.</para>
			<para>USEr NETwork (Usenet) is the main source of newsgroups and newsfeeds. It is an Internet discussion system where people read and post e-mail-like 
			messages called posts to one or more of a number of newsgroups.</para> 
			<para>To join a newsgroup, you create a subscribed list and your newsreader stores the information. You will receive alerts when people have posted new listings 
			and when you check to read the latest update, there will be a posting and bunch of messages from several people. You will see something that looks similar to your e-mail inbox.
			You can decide whether to reply to the newsgroup, the author or to both. Some people prefer not to constantly receive email messages and log in
			from time to time to see the latest updates. The news server posts do expire after a certain length of time, as determined by the person running the server.</para>			
			<para>There are two types of newsreaders, online and offline. The online newsreader downloads just the message headers, and you see 
			what looks like a mailbox. The messages themselves however, are not on your machine. As you access a particular message,
			the newsreader retrieves it from the server. When you are done reading a message, it is not stored on your machine, 
			unless you save it specifically. Offline newsreaders, on the other hand, connect to the server, download all new messages for the newsgroups to which you 
			are subscribed, upload any posts you wrote since the last time you connected to the server, and then disconnect. You can then read the messages as you 
			wish, composing replies and new posts to be uploaded next time you choose to connect. </para>
			<para>Many news related Web sites do offer news feeds that allow you to see when Web sites have added new content. 
			You can get the latest headlines and video in one place, as soon as it is published, without having to visit the Websites you have taken the feed from. 
			Feeds, also known as Really Simple Syndication (RSS), are just Web pages.</para>
			<para>In this section we will cover two types of Newsreaders, Linux Feed Reader (Liferea) for news feeds and Thunderbird for Usenet news.</para>
				<sect2>
				<title>Liferea Newsreader</title>
				<instructornote><title>Instructor Notes:</title><para><emphasis role="italic"> While teaching, demonstrate how to access Liferea and
				Thunderbird.</emphasis></para></instructornote>
				<para>Liferea is an online RSS feed reader. It is a fast, easy-to-use and easy-to-install
				news accumulator for GTK/GNOME.</para>
				<note><title><emphasis role="strong">Note:</emphasis></title>
				<para>You can install Liferea on Ubuntu using the Synaptic
				Package Manager by following the procedure described in
				<emphasis role="strong">Using Alternative E-Mail Client</emphasis>
				section.</para></note>
				<para>The Web sites that offer RSS feeds display an RSS feed symbol next to its URL.</para>
				<figure><title><emphasis role="italic">Identifying RSS Feed Providing Web Sites</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_017.png" format="PNG" />
						</imageobject></mediaobject>
				</figure>
				<para><emphasis role="strong">Accessing Liferea </emphasis></para>
				<note><title><emphasis role="strong">Note:</emphasis></title>
				<para>You have to search the Web site that offers RSS feeds to access Liferea. Look through the complete
				list of newsgroups on your server to search for the group that interests you. Alternatively, a friend
				interested in this group can inform you.</para></note>
				<para>To access Liferea:</para>
				<orderedlist numeration="arabic">
					<listitem><para>Open the Web page that offers RSS feeds.</para>
					<figure><title><emphasis role="italic">Opening RSS Feed Web Page</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_018.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>On this Web page, search for the link that offers RSS feed. Click the link and save
					the URL of that link. This URL will be the feed.</para>
					<figure><title><emphasis role="italic">Searching the Link</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_019.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>Open Liferea. On the <emphasis role="strong">Applications</emphasis> menu, point to
					<emphasis role="strong">Internet</emphasis> and click <emphasis role="strong">Liferea Feed Reader.</emphasis></para>
					<figure><title><emphasis role="italic">Launching Liferea Feed Reader</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_020.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>To subscribe to the feed, right-click anywhere on the left-pane of Liferea window,
					point to New and click <emphasis role="strong">New Subscription</emphasis>. The
					<emphasis role="strong">New Subscription</emphasis> dialogue box will be displayed.</para>
					<figure><title><emphasis role="italic">Subscribing to RSS Feeds</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_021.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>In the <emphasis role="strong">New Subscription</emphasis> dialogue box, paste the
					URL, which is the feed, and click <emphasis role="strong">OK</emphasis>. You will see a new feed in
					the <emphasis role="strong">Liferea</emphasis> window.</para>
					<figure><title><emphasis role="italic">Entering Feed Source</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_022.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					<para>The following graphic shows the new feed in Liferea.</para>
					<figure><title><emphasis role="italic">Viewing New Feeds</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_023.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
				</orderedlist>
				<para>The key features of Liferea are as follows:</para>
				<orderedlist numeration="arabic">
					<listitem><para>Liferea Feed Reader has multiple RSS subscriptions by default.</para></listitem>
					<listitem><para>If you do not want an chapter to be deleted after some time, you can flag it
					and tag it as an important item.</para></listitem>
					<listitem><para>You can use the search function to search through the downloaded items to quickly
					access the information needed.</para></listitem>
					<listitem><para>You can also use an online search engine to search for news other than ones already
					downloaded.</para></listitem>
				</orderedlist>
				<instructornote><title>Instructor Notes:</title><para><emphasis role="italic">The change in feeds properties is required
				if it needs HTTP authentication or other feed specific options.</emphasis></para>
				</instructornote>
				</sect2>
				<sect2>
				<title>Thunderbird</title>
				<para>To use Thunderbird to access news groups, perform the following steps:</para>
				<orderedlist numeration="arabic">
					<listitem><para>When you open Thunderbird for the first time, the <emphasis role="strong">Account
					Wizard</emphasis> helps you to configure an account. On the <emphasis role="strong">New Account Setup
					</emphasis> page, select <emphasis role="strong">Newsgroup account</emphasis> option and click
					<emphasis role="strong">Next</emphasis>. This page informs you about how this wizard will collect
					information to set up a mail or a newsgroup account. You can also contact the system administrator
					or the ISP for information.</para>
					<figure><title><emphasis role="italic">Creating Thunderbird Newsgroup Account</emphasis></title>
						<mediaobject>
						<imageobject>
							<imagedata fileref="images/Lesson04_images_024.png" format="PNG" /></imageobject>
						</mediaobject>
					</figure>
					</listitem>
					<listitem><para>On the <emphasis role="strong">Identity</emphasis> page, in the
					<emphasis role="strong">Your Name</emphasis> box, type your name that you would like to use
					when sending messages and in the <emphasis role="strong">Email Address</emphasis> box, type the
					e-mail address where you would like others to send you e-mail messages. Click
					<emphasis role="strong">Next</emphasis>.</para>
					<figure><title><emphasis role="italic">Creating Account Identity</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_025.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>On the <emphasis role="strong">Server Information</emphasis> page, type the name
					of your newsgroup server in the <emphasis role="strong">Newsgroup Server</emphasis> box. You can
					also type the server address here instead of the server name. Then, click
					<emphasis role="strong">Next</emphasis>. This server name will connect you to different
					newsgroups.</para>
					<figure><title><emphasis role="italic">Providing Newsgroup Server Information</emphasis></title>

					<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_026.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>On the <emphasis role="strong">Account Name</emphasis> dialogue box, type the account
					name in the <emphasis role="strong">Account Name</emphasis> box. This name is for your reference only.
					Click <emphasis role="strong">Next</emphasis>.</para>
					<figure><title><emphasis role="italic">Specifying Account Name</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_027.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>You have completed setting up a newsgroup account. Make sure you verify the
					information before you exit this wizard. Navigate through the pages using the
					<emphasis role="strong">Next</emphasis> and <emphasis role="strong">Back</emphasis> buttons
					and make appropriate changes, if required. Otherwise, click <emphasis role="strong">Finish</emphasis>
					to save the settings. The <emphasis role="strong">News Account-Thunderbird window</emphasis> will
					be displayed.</para>
					<figure><title><emphasis role="italic">Account Information</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_028.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>In the <emphasis role="strong">News Account-Thunderbird</emphasis> window, click
					<emphasis role="strong">Manage newsgroup subscriptions</emphasis> to subscribe to a newsgroup. The
					<emphasis role="strong">Subscribe</emphasis> dialogue box will be displayed.</para>
					<figure><title><emphasis role="italic">Subscribing to a Newsgroup</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_029.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>Several newsgroups will be downloaded from the server address you mentioned
					during the configuration process.</para>
					<figure><title><emphasis role="italic">Viewing the Download Process</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_030.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>If you want to subscribe to a newsgroup on some specific subject, you can search your
					search criterion. Type the search term in <emphasis role="strong">the Show items that contain
					</emphasis> box. The newsgroups related to the search term will be displayed in the
					<emphasis role="strong">Select the newsgroups to subscribe to list</emphasis>. Select any newsgroup
					from the displayed list and click <emphasis role="strong">Subscribe</emphasis> to subscribe to that
					newsgroup. Click <emphasis role="strong">OK</emphasis> to close the <emphasis role="strong">Subscribe
					</emphasis> dialogue box.</para>
					<figure><title><emphasis role="italic">Selecting the Newsgroup to Subscribe</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_031.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>After the subscription is completed, you will start receiving newsletters from the
					subscribed newsgroup. The following graphic shows the newsgroup and related e-mail messages in the
					Thunderbird window:</para>
					<figure><title><emphasis role="italic">Viewing Newsgroup E-mails</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_032.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					<para>When you open Thunderbird to read news letters, there will be a bunch of messages from several
					people. You can read these messages just like e-mail messages. The difference is that the message
					is addressed to the group you were interested in and not to you. Similarly, if you select posting
					a message in response to a message you are reading, you need to decide whether to reply to the
					newsgroup, to the author or to both.</para>
					<tip><title><emphasis role="strong">Nice to Know:</emphasis></title>
					<para>Pan Newsreader is another news reader that works with Usenet. It is
					an open source newsgroup client, which is available for various platforms.
					You can install Pan Newsreader from Synaptic Package Manager on Ubuntu.</para></tip>
					</listitem>
				</orderedlist>
			</sect2>
			</sect1>
			<sect1>
			<title>Sending and Receiving E-Mail Messages</title>
			<para>Ubuntu comes with the Evolution e-mail client which combines mail, calendar, and tasks in one powerful application. 
			Besides Evolution Ubuntu offers more e-mail clients, that can be easily installed through Add/Remove Programmes. Evolution
			 and Thunderbird will be discussed below.</para>
			<sect2>
				<title>Using Evolution Mail</title>
				<instructornote><title>Instructor Notes:</title><para><emphasis role="italic">The focus of this section is to
				configure Evolution e-mail client with Post Office Protocol (POP)
				as the sending server. If the students want to learn more, they can
				refer to: <ulink url="https://help.ubuntu.com/community/EmailClients">https://help.ubuntu.com/community/EmailClients</ulink>.</emphasis></para>
				</instructornote>
				<para>To configure the Evolution e-mail client on Ubuntu:</para>
				<orderedlist numeration="arabic">
					<listitem><para>On the <emphasis role="strong">Applications</emphasis> menu, point to
					<emphasis role="strong">Internet</emphasis> and click <emphasis role="strong">Evolution Mail
					</emphasis>.</para>
					<figure><title><emphasis role="italic">Launching Evolution Mail</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_033.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					<tip><title><emphasis role="strong">Nice to Know:</emphasis></title>
					<para>The <emphasis role="strong">.evolution</emphasis> directory is
					created in the home directory when you run Evolution for the first
					time. It saves its local data in this directory. Then, it opens a
					first-run assistant to help you set up the e-mail accounts. User specific settings
					for evolution are also stored in 
					<emphasis role="strong">.gconf/apps/evolution</emphasis>.</para></tip>
					<para>The <emphasis role="strong">Evolution Setup Assistant</emphasis> is
					displayed, which guides you through various steps to enable Evolution to
					connect to your e-mail accounts and import files from other applications.
					Click <emphasis role="strong">Forward</emphasis>.</para>
					<figure><title><emphasis role="italic">Configuring New E-mail Account</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_034.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem>
					<para>Evolution offers an integrated backup system from Ubuntu 7.10 onward. If you migrate your Evolution data from one system to another, use this dialogue. On the <emphasis role="strong">Restore from backup</emphasis> page, you can restore the backup files such as, e-mails, memos, address book, personal files and many more from your older version of Evolution.</para>
					<figure><title><emphasis role="italic">Restoring Evolution</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_035.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>On the <emphasis role="strong">Identity</emphasis> page, type your full name in the
					<emphasis role="strong">Full Name</emphasis> box and your e-mail address in the
					<emphasis role="strong">E-mail Address</emphasis> box. This is the e-mail address that your ISP
					provides. Your Evolution account is configured with this information. Click
					<emphasis role="strong">Forward</emphasis>.</para>
					<figure><title><emphasis role="italic">Setting up Account Identity</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_036.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					<note><title><emphasis role="strong">Note:</emphasis></title>
					<para>You can skip the information in the <emphasis role="strong">
					Optional Information</emphasis> section. You are required to type
					the information in the <emphasis role="strong">Reply-To</emphasis>
					and <emphasis role="strong">Organisation</emphasis> boxes, only if
					you want to include this in the e-mail messages you send. In
					<emphasis role="strong">Reply-To</emphasis> box, you can type your
					name, favourite quotes or any other information and, in the
					<emphasis role="strong">Organisation</emphasis> box, type any name
					such as that of your organisation, school or college.</para></note>
					</listitem>
					<listitem><para>On the <emphasis role="strong">Receiving E-mail</emphasis> page, in the
					<emphasis role="strong">Server Type</emphasis> box select the type of server your ISP provides.
					Evolution is compatible with numerous server types, but POP is commonly used to receive
					e-mail messages.</para>
					<figure><title><emphasis role="italic">Selecting Server Type for Receiving E-Mail</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_037.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					<note><title><emphasis role="strong">Note:</emphasis></title>
					<para>If you do not know the server information, you can
					contact your system administrator or ISP.</para></note>
					<orderedlist numeration="loweralpha">
						<listitem><para>Select <emphasis role="strong">POP</emphasis> from the
						<emphasis role="strong">Server Type</emphasis> box to connect to and download mail from POP
						servers. The Receiving E-mail page will further prompt you for the configuration
						information.</para>
						<note><title><emphasis role="strong">Note:</emphasis></title>
						<para>For more information about server types, refer to:
						<ulink url="https://help.ubuntu.com/community/EmailClients">https://help.ubuntu.com/community/EmailClients</ulink></para></note>
						</listitem>
						<listitem><para>Type the receiving e-mail server name in the <emphasis role="strong">Server
						</emphasis> box and your account user name in the <emphasis role="strong">Username</emphasis>
						box. This is not your login name to your PC but your login name to your ISP's e-mail account.
						</para></listitem>
						<listitem><para>In the <emphasis role="strong">Security</emphasis> section, you can select
						<emphasis role="strong">Encryption</emphasis> or <emphasis role="strong">No encryption
						</emphasis> in the <emphasis role="strong">Use Secure Connection</emphasis> box. Encryption
						makes the message unreadable to anyone other than the intended recipient.</para></listitem>
						<listitem><para>Select <emphasis role="strong">Password</emphasis> in the
						<emphasis role="strong">Authentication Type</emphasis> box or click <emphasis role="strong">
						Check for Supported Types</emphasis> to have Evolution check for supported authentication
						types. Using the check facility, you can find out the supported authentication types. The
						crossed out authentication types are not supported. Generally, the password is the way you
						authenticate with the server.</para>
						<note><title><emphasis role="strong">Note:</emphasis></title>
						<para>Contact your system administrator or ISP to know about the
						authentication type supported.</para></note>
						</listitem>
						<listitem><para>Click <emphasis role="strong">Forward</emphasis>.</para></listitem>
					</orderedlist>
						<figure><title><emphasis role="italic">Providing POP Server Information</emphasis></title>
							<mediaobject><imageobject>
								<imagedata fileref="images/Lesson04_images_038.png" format="PNG" />
							</imageobject></mediaobject>
						</figure>
					</listitem>
					<listitem><para>On the <emphasis role="strong">Receiving Options</emphasis> page , select the
					following options, if required:</para>
						<orderedlist numeration="loweralpha">
							<listitem><para>To automatically check e-mail messages after a particular interval
							of time, select <emphasis role="strong">Automatically check for new mail every</emphasis>
							check box. Specify the duration of the interval in the <emphasis role="strong">minutes
							</emphasis> list.</para></listitem>
							<listitem><para>In the <emphasis role="strong">Message storage</emphasis> section, select
							<emphasis role="strong">Leave message on server</emphasis> check box<emphasis role="strong">,
							</emphasis> if you want to leave a message on the server.</para></listitem>
							<listitem><para>Select <emphasis role="strong">Disable support for all POP3 extensions
							</emphasis> check box, if you want to disable POP3.</para></listitem>
							<listitem><para>Click <emphasis role="strong">Forward</emphasis>.</para></listitem>
						</orderedlist>
						<figure><title><emphasis role="italic">Specifying Mail Checking and Storage Options</emphasis></title>
							<mediaobject><imageobject>
								<imagedata fileref="images/Lesson04_images_039.png" format="PNG" />
							</imageobject></mediaobject>
						</figure>
					</listitem>
					<listitem><para>On the Sending E-mail page, specify the information according to the way you want to
					send e-mail messages. Select the outbound mail server in the <emphasis role="strong">Server
					Type</emphasis> box.</para>
					<orderedlist numeration="loweralpha">
						<listitem><para>There are two methods you can use to send e-mail messages, SMTP and 
						Programmes Send Mails. SMTP is the common method that is used to send e-mail messages.
						Select <emphasis role="strong">SMTP</emphasis> as your outbound mail server type in the
						<emphasis role="strong">Server Type</emphasis> box.</para></listitem>
						<listitem><para>Specify the outbound server configuration:</para>
					<figure><title><emphasis role="italic">Providing SMTP Server Information</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_040.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
						<orderedlist numeration="arabic">
							<listitem><para>Type the host address in the <emphasis role="strong">Server</emphasis> box.
							This is the address of the outbound server that your ISP provides.</para></listitem>
							<listitem><para>Specify how you want the server to authenticate. Select
							<emphasis role="strong">Server requires authentication</emphasis> check box, if
							your server requires authentication. If you select this check box, you will be
							asked to select your authentication type in the <emphasis role="strong">Type
							</emphasis> box. You can also click <emphasis role="strong">Check for Supported
							Types</emphasis> to have evolution check for supported types.</para>
							</listitem>
							<listitem><para>Type the evolution account user name in the <emphasis role="strong">Username								</emphasis> box.</para></listitem>
							<listitem><para>Select <emphasis role="strong">Remember Password</emphasis> check box, if
							you want evolution to remember your password. Then, click
							<emphasis role="strong">Forward</emphasis>. The <emphasis role="strong">Account
							Management</emphasis> page is displayed.</para></listitem>
							</orderedlist>
						</listitem>
						</orderedlist>
					</listitem>
					<listitem><para>It is possible for Evolution to access multiple e-mail providers. To differentiate
					between them, you can give each e-mail provider a name. Type a name for this configuration or your
					account in the <emphasis role="strong">Name</emphasis> box. You can type any name you prefer as this
					is only for your reference. Then, click <emphasis role="strong">Forward</emphasis>.</para>
					<figure><title><emphasis role="italic">Providing Account Information</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_041.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>On the <emphasis role="strong">Timezone</emphasis> page, select the time zone you
					are in either on the map or from the <emphasis role="strong">Selection</emphasis> list. Click
					<emphasis role="strong">Forward</emphasis>.</para>
					<figure><title><emphasis role="italic">Specifying Timezone</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_042.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>Configuration is done. Click <emphasis role="strong">Apply</emphasis> to save your
					settings. The Evolution window will be displayed.</para>
					<figure><title><emphasis role="italic">Evolution</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_043.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
				</orderedlist>
				<note><title><emphasis role="strong">Note:</emphasis></title>
				<para>For more information on how to use the Evolution e-mail client, refer to:
				<ulink url="https://help.ubuntu.com/7.04/internet/C/email.html">https://help.ubuntu.com/7.04/internet/C/email.html</ulink></para></note>
			</sect2>
			<sect2>
				<title>Using an Alternative E-Mail Client</title>
				<para>In addition to Evolution, you can use many other e-mail clients, such as
				Mozilla Thunderbird, Balsa and Pine. If you have been using the Mozilla
				Suite, you may prefer to use Thunderbird which is very similar. Try them both and
				see which you prefer. Mozilla Thunderbird is an e-mail application developed
				by Mozilla Foundation. It is a free, cross-platform e-mail and news application.</para>
				<tip><title><emphasis role="strong">Nice to Know:</emphasis></title>
				<para>Mozilla Suite is a cohesive collection of integrated Internet
				applications, including a Web browser, e-mail and newsgroup client, Internet Relay Chat (IRC) chat
				client, address book organizer and Web page creation utility.</para></tip>
				<para>The Thunderbird e-mail application is available in the Universe	
				repository and can be installed on your computer from the Synaptic Package
				Manager.</para>
				<para>To install Thunderbird on Ubuntu, perform the following steps:</para>
				<orderedlist numeration="arabic">
					<listitem><para>On the <emphasis role="strong">System</emphasis> menu, point to
					<emphasis role="strong">Administration</emphasis> and select <emphasis role="strong">Synaptic
					Package Manager</emphasis>. The <emphasis role="strong">Synaptic Package Manager</emphasis> window
					will be displayed.</para>
					<figure><title><emphasis role="italic">Launching Synaptic Package Manager</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_044.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>In the <emphasis role="strong">Synaptic Package Manager</emphasis>
					dialogue box, you can select the package you need. The left pane lists the
					categories, and the right pane lists the packages. You can search for the
					package by clicking Search and specifying its name. If you do not know the
					name of the package, select the category in the left pane to filter the list
					of packages. You can then select the check box next to the required package
					in the right pane.</para>
					<tip><title><emphasis role="strong">Nice to Know:</emphasis></title>
					<para>If you want to view the installed and uninstalled packages, click
					<emphasis role="strong">Status</emphasis>. To know the source repository
					of the package, click <emphasis role="strong">Origin</emphasis>. Click
					<emphasis role="strong">Custom Filters</emphasis> if you want to know 
					whether a package is broken or can be upgraded.</para></tip>
					
					</listitem>
					<listitem><para>Since you know the name of the package, you can find it by
					specifying its name. Click <emphasis role="strong">Search</emphasis>. The
					<emphasis role="strong">Find</emphasis> dialogue box opens. Type the name
					of the package, <emphasis role="strong">Thunderbird</emphasis>, in the
					<emphasis role="strong">Search</emphasis> field and click
					<emphasis role="strong">Search</emphasis>. The Mozilla Thunderbird package
					displays in the right pane of the <emphasis role="strong">Synaptic
					Package Manager</emphasis> window. You can view the description of the
					selected package in the bottom pane and check if this package is the one
					that meets your requirement before you initiate the installation process.</para>
					<figure><title><emphasis role="italic">Searching Thunderbird</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_045.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					<note><title><emphasis role="strong">Note:</emphasis></title>
					<para>To return to the list of categories after searching the
					packages using <emphasis role="strong">Search</emphasis>, click
					<emphasis role="strong">Sections</emphasis>.</para></note>
					</listitem>
					<listitem><para>Select the <emphasis role="strong">Mark for Installation</emphasis>
					check box to install the package.</para>
					<figure><title><emphasis role="italic">Marking Thunderbird for Installation</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_046.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>The package that you choose to install may depend on other packages. In this case,
					you are notified about the dependencies. To continue making the changes required to resolve the
					dependencies, click <emphasis role="strong">Mark</emphasis>.</para></listitem>
					<listitem><para>To confirm that you want to make the marked changes, click <emphasis role="strong">
					Apply.</emphasis></para>
					<figure><title><emphasis role="italic">Confirming Changes</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_047.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>The <emphasis role="strong">Summary</emphasis> dialogue box opens, prompting you for
					a final check before making the marked changes. Click <emphasis role="strong">Apply</emphasis> to
					continue with the changes.</para>
					<para>This completes the procedure of installing Thunderbird by using Synaptic Package Manager.
					To access Thunderbird, on the <emphasis role="strong">Applications</emphasis> menu, point to
					<emphasis role="strong">Internet</emphasis> and click <emphasis role="strong">Mozilla Thunderbird Mail/News
					</emphasis>.</para>
					<para>This displays the Thunderbird window.</para>
					<figure><title><emphasis role="italic">Launching Mozilla Thunderbird Mail/News</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_048.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					<figure><title><emphasis role="italic">Thunderbird Window</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_049.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
				</orderedlist>
				<para><emphasis role="strong">Features of Thunderbird</emphasis></para>
				<para>Thunderbird features many enhancements to help you better manage your inbox, send emails and 
				organise your correspondence.</para>
				<para>Some of its key features are:</para>
				<itemizedlist>
					<listitem><para><emphasis role="strong">Stop Junk Mail</emphasis></para>
					<para>If you are tired of spam and annoying advertising in your Inbox, Mozilla Thunderbird
					provides effective tools for detecting junk mail. These tools analyse your e-mail
					message and identify those that are most likely to be junk. Your junk mail can be automatically
					deleted or placed in a specific folder.</para>
					<figure><title><emphasis role="italic">Stopping Junk Mail</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_050.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					<para>To activate the junk mail filters in Thunderbird:</para>
					<orderedlist numeration="arabic">
						<listitem><para>On the <emphasis role="strong">Tools</emphasis> menu, click
						<emphasis role="strong">Junk Mail Controls</emphasis>. The <emphasis role="strong">Junk Mail
						Controls</emphasis> window will be displayed.</para></listitem>
						<listitem><para>Click the <emphasis role="strong">Adaptive Filter</emphasis> tab. Select the
						<emphasis role="strong">Enable adaptive junk mail detection</emphasis> check box and click
						<emphasis role="strong">OK</emphasis></para></listitem>
					</orderedlist>
					</listitem>
					<listitem><para><emphasis role="strong">Customise your mail</emphasis></para>
					<para>You have three column views to access you e-mail messages: Classic, Wide and Vertical view.</para>
					<figure><title><emphasis role="italic">Customising the E-mail View</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_051.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para><emphasis role="strong">Built-in Spell Checker</emphasis></para>
					<para>To check for correct spelling, click <emphasis role="strong">Spell</emphasis> on the
					toolbar.</para>
					<figure><title><emphasis role="italic">Spell Checker</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_052.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para><emphasis role="strong">Security</emphasis></para>
					<para>Thunderbird provides enhanced security features, which is equivalent to enterprise and
					government-grade security. It offers built-in support for Secure/Multipurpose Internet Mail
					Extensions (S/MIME) secure e-mail message.</para></listitem>
					<listitem><para><emphasis role="strong">Extensions</emphasis></para>
					<para>Extensions are powerful tools to help you build a mail client that meets your specific
					needs. Mozilla Thunderbird has several features, such as quick search, a smart address book,
					advanced message filtering and more.</para></listitem>
					<listitem><para><emphasis role="strong">News Reader</emphasis></para>
					<para>Mozilla Thunderbird makes it easier to subscribe to your favourite newsgroups, downloading headers and messages and offline
					support.</para>
					<figure><title><emphasis role="italic">Thunderbird as a Newsgroup</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_053.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para><emphasis role="strong">Themes</emphasis></para>
					<para>As with most elements on Ubuntu, you can personalise the themes to change the look and feel of Mozilla Thunderbird. A theme
					can change the toolbar icons or the complete appearance of an application.</para>
					</listitem>
					<listitem><para><emphasis role="strong">Cross-Platform Support</emphasis></para>
					<para>Thunderbird is used on various platforms, such as Ubuntu, Microsoft Windows, Mac OS X and Unix-based
					operating systems.</para></listitem>
				</itemizedlist>
				</sect2>
		</sect1>
		<sect1>
			<title>Instant Messaging</title>
			<para>E-mail message is not expected to be real-time, which means you can respond to it when time allows.
			But when 'Immediacy' is required, instant messaging (IM) is the way to go. Using IM over the Internet
			can bring down costs of long distance phone calls when you want to stay in contact with friends. While
			in office, if you want an answer to a simple question, IM facilitates quick and easy communication and
			reduces the amount of e-mail messages sent and received in a day. IM also enables you to view a person
			using Web-cams or talk over the Internet for free.</para>
			<para>The default instant messenger client on Ubuntu is Pidgin, a cross-platform instant messenger that
			supports various popular IM network protocols. Using Pidgin, you can communicate with people who use America
			Online (AOL) Instant Messenger (AIM/ICQ), Gadu-Gadu, GroupWise, IRC, Jabber, MSN, Napster and Yahoo. It
			allows you to list all your friends in one window. Pidgin users can log on to multiple accounts on multiple IM networks simultaneously. This means that you can chat with friends on AIM, talk to a friend on Yahoo Messenger, and sit in an IRC channel, all at the same time. Pidgin supports many features of the various networks, such as file transfer, away messages, typing notification, and MSN window closing notification. A few popular features are Buddy Pounces, which give the ability to notify you, send a message, play a sound or run a programme when a specific buddy goes away, signs online or returns from idle.</para>
			
			<para>To connect to an existing e-mail account using the Pidgin instant messenger, perform the following
			steps:</para>
			<orderedlist numeration="arabic">
				<listitem><para>On the <emphasis role="strong">Applications</emphasis> menu, point to <emphasis role="strong">Internet</emphasis> and click <emphasis role="strong">Pidgin Internet Messenger</emphasis>. The <emphasis role="strong">Accounts</emphasis> dialogue box with a welcome message will be displayed.</para>
			<figure id="fig:pidgin"><title><emphasis role="italic">Launching Pidgin Internet Messenger</emphasis></title>
				<mediaobject><imageobject>
					<imagedata fileref="images/Lesson04_images_054.png" format="PNG" />
				</imageobject></mediaobject>
				</figure>
				</listitem>
				<listitem><para>Click <emphasis role="strong">Add</emphasis> to configure your any existing e-mail
				account on Pidgin. The <emphasis role="strong">Add Account</emphasis> dialogue box will be displayed.</para>
				<figure><title><emphasis role="italic">Adding a New IM Account</emphasis></title>
					<mediaobject><imageobject>
						<imagedata fileref="images/Lesson04_images_055.png" format="PNG" />
					</imageobject></mediaobject>
				</figure>
				</listitem>
				<listitem><para>In the <emphasis role="strong">Add Account</emphasis> dialogue box, select the protocol,
				which is your e-mail account server name from the <emphasis role="strong">Protocol</emphasis> box. The
				protocol is the name of the server you want to use for chat. Type your selected protocol's e-mail id
				in the <emphasis role="strong">Screen name</emphasis> box and the corresponding password. Type your
				nick name that you would like to be known by while chatting in the <emphasis role="strong">Local
				alias</emphasis> box. Click <emphasis role="strong">Save</emphasis> to create the account. The
				<emphasis role="strong">Accounts</emphasis> window will be displayed.</para>
				<figure><title><emphasis role="italic">Providing Basic Account Information</emphasis></title>
					<mediaobject><imageobject>
						<imagedata fileref="images/Lesson04_images_056.png" format="PNG" />
					</imageobject></mediaobject>
				</figure>
				</listitem>
				<listitem><para>You can see the newly created account with a check mark indicating that it is active
				in the <emphasis role="strong">Accounts</emphasis> window. Click <emphasis role="strong">Close</emphasis>.
				</para>
				<figure><title><emphasis role="italic">Viewing Added Accounts</emphasis></title>
					<mediaobject><imageobject>
						<imagedata fileref="images/Lesson04_images_057.png" format="PNG" />
					</imageobject></mediaobject>
				</figure>
				<note><title><emphasis role="strong">Note:</emphasis></title>
				<para>If you want to add another e-mail account, click
				<emphasis role="strong">Add</emphasis> in the <emphasis role="strong">Accounts</emphasis>
				window and perform steps 1-4.</para></note>
				</listitem>
				<listitem><para>Now, click the <emphasis role="strong">Pidgin</emphasis> icon on the top panel of the
				desktop to view the <emphasis role="strong">Buddy List</emphasis> window for your current account.</para>
				<figure><title><emphasis role="italic">Viewing Buddy List</emphasis></title>
					<mediaobject><imageobject>
						<imagedata fileref="images/Lesson04_images_058.png" format="PNG" />
					</imageobject></mediaobject>
				</figure>
				</listitem>
				<listitem>
				<para>To start using Pidgin, on the <emphasis role="strong">Buddies</emphasis> menu, click
				<emphasis role="strong">New Instant Message</emphasis>. The <emphasis role="strong">New Instant
				Message</emphasis> window will be displayed.</para>
				<figure id="fig:pidgin_buddylist"><title><emphasis role="italic">New Instant Message</emphasis></title>
					<mediaobject><imageobject>
						<imagedata fileref="images/Lesson04_images_059.png" format="PNG" />
					</imageobject></mediaobject>
				</figure>
				</listitem>
				<listitem><para>To interact with other users, type the screen name or alias of the person you would
				like to chat with in the <emphasis role="strong">Name</emphasis> box and click <emphasis role="strong">
				OK</emphasis>. An IM window will be displayed.</para>
				<figure><title><emphasis role="italic">Specifying Buddy Name </emphasis></title>
					<mediaobject><imageobject>
						<imagedata fileref="images/Lesson04_images_060.png" format="PNG" />
					</imageobject></mediaobject>
				</figure>
				
				</listitem>
				<listitem><para>You can use the box at the bottom of the window to type your messages and press Enter
				to send them. This is how you can start your conversation.</para>
				<figure><title><emphasis role="italic">IM Window</emphasis></title>
					<mediaobject><imageobject>
						<imagedata fileref="images/Lesson04_images_061.png" format="PNG" />
					</imageobject></mediaobject>
				</figure>
				<tip><title><emphasis role="strong">Nice to Know:</emphasis></title>
				<para>You can change the appearance of Pidgin by adding additional features,
				such as changing its graphical interface and theme to it. The packages
				required to do this are Pidgin-guifications, Pidgin-libnotify and Pidgin-themes. You can install these packages from Synaptic Package Manager by following the
			procedure listed in the <emphasis role="strong">Using Alternative E-Mail Client</emphasis>
			section.</para></tip>
				</listitem>
			</orderedlist>
			
		</sect1>
		<sect1>
			<title>Making Phone Calls Using Softphones</title>
			<para>A softphone is a software programme that is used to make telephone calls over the Internet using a
			computer instead of using a regular phone. Your service provider may offer computer-to-computer
			calls for free, but PC-to-phone and phone-to-PC calls usually are charged. You need to have the same
			communication protocol and use a common audio codec to communicate with another person. The audio codec
			defines how voice is translated into digital signals. Examples of
			SIP softphones are Ekiga, WengoPhone, SIP Express Router and many more.</para>
			<para>You use a softphone with a headset connected to the computer or with a USB phone.
			The features of softphone include all standard telephony features, such as mute, flash, hold and transfer.
			It also includes new features, such as presence, video, wideband audio and many more.  The softphone
			requirements to make voice calls over the Internet are a computer with a microphone and speaker, a headset
			or USB phone, Internet connectivity and an account with an Internet telephony service provider.</para>
			<tip><title><emphasis role="strong">Nice to Know:</emphasis></title>
			<para>Skype, Google Talk and Vonage are Internet telephony service providers whose software
			you would need to install on your computer. But these three providers
			are not interoperable, and you cannot place a direct call between them.</para></tip>
			<para>The configuration of Ekiga and the features of WengoPhone are described now.</para>
			<sect2>
				<title>Using Ekiga</title>
				<para>Ekiga is an open source softphone application for Ubuntu. It is a free Voice over IP (VoIP) and video
				conferencing application. VoIP routes voice conversations over the Internet or through any other IP-based
				network. You can use Ekiga to call, send instant messages and be contacted by other Ekiga users.
				</para>
				<para>The First Time Configuration Assistant helps you configure Ekiga. It appears automatically when you
				open Ekiga for the first time. To configure Ekiga on Ubuntu:</para>
				<orderedlist numeration="arabic">
					<listitem><para>On the <emphasis role="strong">Applications</emphasis> menu, point to
					<emphasis role="strong">Internet</emphasis> and click <emphasis role="strong">Ekiga</emphasis>. The 
					<emphasis role="strong">Configuration Assistant</emphasis> page will be displayed. Click
					<emphasis role="strong">Forward</emphasis>.</para> 
					<figure id="ekiga"><title><emphasis role="italic">Launching Ekiga Softphone</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_062.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					
					</listitem>
					<listitem><para>On the <emphasis role="strong">Personal Information</emphasis> page, type your full
					name in the <emphasis role="strong">Please enter your first name and your surname</emphasis> box. The
					name that you specify is used for display purposes when you connect to other audio or video
					applications. Click <emphasis role="strong">Forward</emphasis>.</para>
					<figure><title><emphasis role="italic">Specifying Display Name</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_063.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>On the <emphasis role="strong">ekiga.net Account</emphasis> page, type your Ekiga's
					account user name and password that you use to log in to your existing Ekiga account. You will get
					this detail from the ekiga.net free SIP service. Click <emphasis role="strong">Forward</emphasis>.
					</para>
					<figure><title><emphasis role="italic">Specifying ekiga.net Account Username and Password</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_064.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					<note><title><emphasis role="strong">Note:</emphasis></title>
					<para>If you do not have an SIP account, you can click the link
					<emphasis role="strong">Get an ekiga.net SIP account</emphasis> on the
					page to create an SIP account on ekiga.net.</para></note>
					</listitem>
					<listitem><para>On the <emphasis role="strong">Connection Type</emphasis> page, select the type of
					Internet connection you are using on your computer from the <emphasis role="strong">Please choose your
					connection type</emphasis> box. This connection type determines the best quality settings that Ekiga
					will use during calls. If you do not know the connection type, contact your system administrator.
					Click <emphasis role="strong">Forward</emphasis>. You can change these settings later.</para>
					<figure><title><emphasis role="italic">Selecting Connection Type</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_065.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>On the <emphasis role="strong">NAT Type</emphasis> page, click
					<emphasis role="strong">Detect NAT Type</emphasis>. It informs you which Network Address Translation
					(NAT) type was detected and automatically configures Ekiga to transparently cross your router. So,
					NAT avoids all the problems associated with reserving IP addresses. Click <emphasis role="strong">
					Forward</emphasis>.</para>
					<figure><title><emphasis role="italic">Selecting NAT Type</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_066.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					<note><title><emphasis role="strong">Note:</emphasis></title>
					<para>To learn more about NAT, refer to:
					<ulink url="http://en.wikipedia.org/wiki/Network_address_translation">http://en.wikipedia.org/wiki/Network_address_translation</ulink>.</para></note>
					</listitem>
					<listitem><para>You can make your music sound just like it was recorded by correct use of
					<emphasis role="strong">plug-ins</emphasis>. On the <emphasis role="strong">Audio Manager</emphasis>
					page, select the audio manager, which is the plug-in, according to the sound card of your computer. The audio manager is a plug-in that manages your audio device and is dependant on the operating system on your computer. Though it is recommended to use ALSA, you should check with your your system administrator to identify the appropriate audio manager for the audio device that you want to use. Then, click <emphasis role="strong">Forward</emphasis>.</para>
					<figure><title><emphasis role="italic">Selecting Audio Manager</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_067.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>Ekiga requires audio output and input devices to play and record sound files. The
					audio output device is used to play audio and audio input device to record your voice. So, on the
					<emphasis role="strong">Audio Devices</emphasis> page, select the audio output and input devices. For
					example, headset or speakers are the output device and your microphone the audio input device. Now,
					click <emphasis role="strong">Test Settings</emphasis> to check the functionality of audio devices
					and the click <emphasis role="strong">Forward</emphasis>.</para>
					<figure><title><emphasis role="italic">Selecting Audio Devices</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_068.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>On the <emphasis role="strong">Video Manager</emphasis> page, select the video
					manager, which is the plug-in used to manage your video devices. You can select Video4Linux to manage
					Webcams or AVC / DC for Firewire cameras. Click <emphasis role="strong">Forward</emphasis>.</para>
					<figure><title><emphasis role="italic">Selecting Video Manager</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_069.png" format="PNG" />
						</imageobject></mediaobject>
						</figure>
					</listitem>
					<listitem><para>On the <emphasis role="strong">Video Devices</emphasis> page, select the video input
					device from the <emphasis role="strong">Please choose the video input device</emphasis> box. The
					video input device is the device managed by the video manager that will be used to capture video.
					If you do not want to do video conferencing or if you do not have a video device, you may skip this
					page.</para>
					<para>Click <emphasis role="strong">Test Settings</emphasis> to ensure that your video device
					works with Ekiga. Click <emphasis role="strong">Forward</emphasis>.</para>
					<figure><title><emphasis role="italic">Selecting Video Devices</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_070.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>The configuration of Ekiga is now complete. This window displays a configuration
					summary of the settings you have selected. You can verify your settings here. In case you want to
					make any modification, navigate to the required page by using <emphasis role="strong">Back</emphasis>
					and <emphasis role="strong">Next</emphasis> and make appropriate changes. Click
					<emphasis role="strong">Apply</emphasis> to save the configuration.</para>
					<figure><title><emphasis role="italic">Account Configuration Summary</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_071.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					<para>The Configuration Assistant will close. </para>
					<note><title><emphasis role="strong">Note:</emphasis></title>
					<para>After installing Ekiga, if you want to modify any configuration, you
					can run the configuration assistant again by <emphasis role="strong">Preferences</emphasis>
					on the <emphasis role="strong">Edit</emphasis> menu in the Ekiga window.</para></note>
					<tip><title><emphasis role="strong">Nice to Know:</emphasis></title>
					<para>For more information on Ekiga, refer to
					<ulink url="http://www.ekiga.org">http://www.ekiga.org</ulink>.</para></tip>
					
					<para>The Ekiga window will be displayed. It is the default softphone application available on Ubuntu.</para>
					<figure><title><emphasis role="italic">Ekiga Window</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_072.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
				</orderedlist>
				<para><emphasis role="strong">Making Calls Using Ekiga</emphasis></para>
				<para><emphasis role="strong">From Computer to Computer</emphasis></para>
				<para>To place and receive calls through your computer, you require a SIP address. You can use the SIP
				address to call your friends and family, and they in turn can use this address to call you. A SIP
				address works on the the same principle as an e-mail address. You can sign up for a free account on Ekiga.net and this will
				give you a unique SIP address. An example of SIP address is sip:dsandras@ekiga.net.</para>
				<para>Using Ekiga, you can call anyone who is registered to the public SIP provider and uses a SIP
				software or hardware. You can use the online address book of Ekiga to find the SIP addresses of other Ekiga users. It is of course possible to call users who are using another provider than ekiga.net. You can actually call any user using SIP software or hardware, registered to any public SIP provider. To make calls, you can type the Uniform Resource Locator (URL) address of the user you wish to call in the <emphasis role="strong">sip:</emphasis> input box and click the connect icon on the right of the text box to place a call. If you know the URL address of the party that you wish to call, you may enter that URL into the sip: input box at the top of the screen and press the Connect button. Pressing the Connect button would call the user at that address. With the default setup, you can simply type sip:foo to call user foo@ekiga.net.</para>
				<para><emphasis role="strong">From Computer to Regular Phones</emphasis></para>
				<para>You can use Ekiga with multiple Internet Telephony Service Providers. There is a charge for this service so 
				you will need to create an account with the provider first. You can then dial the numbers from the <emphasis role="strong">Dialpad</emphasis> and make
				calls.</para>
				<para>If you want to create an account and use it to call your friends and family using appears, which
				allows you to create an account using the Get an Ekiga PC-to-Phone account. After the account is created,
				you will receive a login and a password by an e-mail message. Simply enter them in the dialogue box,
				select <emphasis role="strong">Use PC-To-Phone service</emphasis> and you are ready to call regular
				phones using Ekiga. With the default setup, you can simply use sip:00911129535955 to call the real phone number 003210444555, 00 is the international dialling code, 91 is the country code and 1129535955 is the number to call.</para>
				<para><emphasis role="strong">From Real Phones to Computer</emphasis></para>
				<para>You can also use Ekiga to receive incoming calls from regular phones. For this, you have to login
				to <emphasis role="strong">PC-To-Phone</emphasis> account and purchase a phone number. Ekiga then rings,
				when people call you at that phone number.</para>
				<note><title><emphasis role="strong">Note:</emphasis></title>
				<para>To learn more about making phone calls by using Ekiga, refer to
				<ulink url="http://www.ekiga.org/index.php?rub=3">http://www.ekiga.org/index.php?rub=3</ulink>.</para></note>
			</sect2>
			<sect2>
				<title>Installing WengoPhone</title>
				<para>WengoPhone is also a free software based on SIP. The OpenWengo community developed WengoPhone under the GNU General
				Public License (GPL). You can speak to other users of SIP compliant VoIP software at no cost by using
				WengoPhone. In addition, it allows you to call landlines, cellphones, send messages and to make video
				calls.</para>
				<para>Wengophone is not a default application on Ubuntu. But you can download it from Synaptic Package
				Manager.</para>
				<note><title><emphasis role="strong">Note:</emphasis></title>
				<para>You can follow the procedure listed in the <emphasis role="strong">Using
				Alternative E-Mail Client</emphasis> section to install Wengophone on Ubuntu.</para></note>
				<para>To open Wengophone on Ubuntu, on the <emphasis role="strong">Applications</emphasis> menu, point to
				<emphasis role="strong">Internet</emphasis> and click <emphasis role="strong">WengoPhone</emphasis>.
				</para>
				<figure id="wengophone"><title><emphasis role="italic">Launching WengoPhone</emphasis></title>
					<mediaobject><imageobject>
						<imagedata fileref="images/Lesson04_images_073.png" format="PNG" />
					</imageobject></mediaobject>
				</figure>
				<para>The <emphasis role="strong">WengoPhone-Login</emphasis> window will be displayed.</para>
				
				<para>You need to have a Wengo account to use WengoPhone.Type your Wengo e-mail address in the
				<emphasis role="strong">Email Address</emphasis> field and the account password in the
				<emphasis role="strong">Password</emphasis> box. If you do not have a Wengo account, click
				<emphasis role="strong">Click here if you don't have a Wengo account</emphasis> to create one and then
				click <emphasis role="strong">Login</emphasis> to start using WengoPhone.</para>
					<figure><title><emphasis role="italic">WengoPhone Login Window</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_074.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
				<para>To learn how to use Wengophone, refer to:
				<ulink url="http://www.wengophone.com/">http://www.wengophone.com/</ulink>
				</para>
				<tip><title><emphasis role="strong">Nice to Know:</emphasis></title>
				<para>WengoPhone uses DSL, Cable or WiFi Internet connection to provide
				telephony services.</para></tip>
					<figure><title><emphasis role="italic">Wengophone Window</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_075.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
				<para>The main features of WengoPhone include:</para>
				<orderedlist numeration="arabic">
					<listitem><para><emphasis role="strong">Chat:</emphasis> You can chat with your MSN, Yahoo, AIM,
					Jabber and Google Talk contacts from within your WengoPhone.</para>
					</listitem>
					<listitem><para><emphasis role="strong">Call:</emphasis> You have to know the nickname of users using
					Wengo account and can make calls from your computer to another computer for free. To make calls on
					landline and mobile, you need to purchase Wengo's call-credits. WengoPhone has useful conference call,
					call waiting and call forward features.</para>
					</listitem>
					<listitem><para><emphasis role="strong">Video:</emphasis> WengoPhone allows you to make free video
					calls with your Wengo contacts.</para>
					</listitem>
					<listitem><para><emphasis role="strong">SMS:</emphasis> WengoPhone enables you to send SMS to your
					friends' mobile phones all over the world at one single rate. It offers you to purchase a call-in
					service with a Wengo phone number so that people will be able to contact you on this number, and you
					can hear their message as a regular phone call.</para>
					</listitem>
				</orderedlist>
			</sect2>
			<sect2>
				<title>Skype</title>
				<para>Skype is another softphone that can be used on Ubuntu to make calls over the Internet. The source code of Skype software is proprietary,
				but the software is free to use. Your calls go through distributed servers and not through
				a central server. To accomplish this, Skype uses a decentralized peer-to-peer technologies and its own
				proprietary communication protocol. Skype uses encrypted communication, which means all communications
				are encrypted from end-to-end so that others cannot listen in. We will not go into detail over Skype communication here.</para>
			</sect2>
		</sect1>
		<sect1>
			<title>Lesson Summary</title>
			<para>In this lesson, you learned that:</para>
			<itemizedlist>
				<listitem><para>You can connect a computer to the Internet using cable, wireless and dial-up
				connections.</para></listitem>
				<listitem><para>Mozilla Firefox is an open source, powerful and secure Web browser. It is available
				for free and is the default browser on Ubuntu.</para></listitem>
				<listitem><para>Firefox includes two powerful features that make your online experience better and
				more productive -integrated search system and live bookmarking.</para></listitem>
				<listitem><para>Liferea is an RSS feed reader, which offers basic and useful features to manage your
				newsgroup subscription.</para></listitem>
				<listitem><para>Evolution is the default e-mail client for Ubuntu.</para></listitem>
				<listitem><para>Mozilla Thunderbird is the e-mail application developed by Mozilla Foundation. It is a free, cross-platform e-mail and news client. It is also used to access newsgroups.</para></listitem>
				<listitem><para>The default instant messenger client on Ubuntu is Pidgin. It is a cross-platform instant messenger that supports multiple popular IM network protocols.</para></listitem>
				<listitem><para>Ekiga is the default open source softphone application for Ubuntu.</para></listitem>
				<listitem><para>WengoPhone is a free-software based on SIP. It allows you to call landlines and
				cellphones, send messages and make video calls.</para></listitem>
				
				</itemizedlist>
		</sect1>
		    <questions>
		<sect1>
			<title>Review Exercise</title>
			<para><emphasis role="strong">Question 1</emphasis></para>
			<para>What are the three main ways to connect to the Internet?</para>
			<answer>
			<para><emphasis role="strong">Answer 1</emphasis></para>
			<para>The three main ways to connect to the Internet are through cable, wireless and dial-up
			connections.</para>
			</answer>
			<para><emphasis role="strong">Question 2</emphasis></para>
			<para>Which tool is used to identify a modem on Ubuntu?</para>
			<answer>
			<para><emphasis role="strong">Answer 2</emphasis></para>
			<para>The ScanModem tool is used to identify a modem on Ubuntu.</para>
			</answer>
			<para><emphasis role="strong">Question 3</emphasis></para>
			<para>Why do you require a live bookmark in Firefox?</para>
			<answer>
			<para><emphasis role="strong">Answer 3</emphasis></para>
			<para>Mozilla Firefox uses a live bookmark for quick access to saved Web addresses.</para>
			</answer>
			<para><emphasis role="strong">Question 4</emphasis></para>
			<para>What is a feed?</para>
			<answer>
			<para><emphasis role="strong">Answer 4</emphasis></para>
			<para>A feed is an XML Web page that contains a list of links to other Web pages.</para>
			</answer>
			<para><emphasis role="strong">Question 5</emphasis></para>
			<para>Match the following:</para>
			<table>
			<title>Table 1</title>
				<tgroup cols="2">
					<tbody>
						<row>
							<entry><para>1) Evolution</para></entry>
							<entry><para>a) Web browser</para></entry>
						</row>
						<row>
							<entry><para>2) Firefox</para></entry>
							<entry><para>b) Mail client</para></entry>
						</row>
						<row>
							<entry><para>3) Ekiga</para></entry>
							<entry><para>c) Instant messenger</para></entry>
						</row>
						<row>
							<entry><para>4) Pidgin</para></entry>
							<entry><para>d) Phone calls</para></entry>
						</row>
					</tbody>
				</tgroup>
			</table>
			<answer>
			<para><emphasis role="strong">Answer 5</emphasis></para>
			<para>1-b, 2-a, 3-d and 4-c</para>
			</answer>
			<para><emphasis role="strong">Question 6</emphasis></para>
			<para>Thunderbird is a free, ______e-mail and news client.</para>
			<answer>
			<para><emphasis role="strong">Answer 6</emphasis></para>
			<para>Thunderbird is a free, cross-platform e-mail and news client.</para>
			</answer>
			<para><emphasis role="strong">Question 7</emphasis></para>
			<para>You can get an SIP address from ________.</para>
			<answer>
			<para><emphasis role="strong">Answer 7</emphasis></para>
			<para>You can get an SIP address from <ulink url="http://www.ekiga.net">http://www.ekiga.net</ulink>.</para>
			</answer>
			<para><emphasis role="strong">Question 8</emphasis></para>
			<para>On which protocol is WengoPhone based?</para>
			<para>A. Transmission Control Protocol (TCP)</para>
			<para>B. User Datagram Protocol (UDP)</para>
			<para>C. Session Initiation Protocol (SIP)</para>
			<para>D. Internet Protocol version 6 (Ipv6)</para>
			<answer>
			<para><emphasis role="strong">Answer 8</emphasis></para>
			<para>C. Session Initiation Protocol (SIP)</para>
			</answer>
			<para><emphasis role="strong">Question 9</emphasis></para>
			<para>The source code of Skype software is ______, but the software is ____to use.</para>
			<answer>
			<para><emphasis role="strong">Answer 9</emphasis></para>
			<para>The source code of Skype software is proprietary, but the software is free to use.</para>
			</answer>
			<para><emphasis role="strong">Question 10</emphasis></para>
			<para>Which of the following is an RSS feed reader?</para>
			<para>A. Ekiga</para>
			<para>B. Liferea</para>
			<para>C. Pan</para>
			<para>D. Wengo</para>
			<answer>
			<para><emphasis role="strong">Answer 10</emphasis></para>
			<para>B. Liferea</para>
			</answer>
			<para><emphasis role="strong">Question 11</emphasis></para>
			<para>Liferea is a news ________for online news feeds.</para>
			<answer>
			<para><emphasis role="strong">Answer 11</emphasis></para>
			<para>Liferea is a news accumulator for online news feeds.</para>
			</answer>
			<para><emphasis role="strong">Question 12</emphasis></para>
			<para>Which of the following is proprietary software?</para>
			<para>A. Skype</para>
			<para>B. Ekiga</para>
			<para>C. Wengophone</para>
			<para>D. Firefox</para>
			<answer>
			<para><emphasis role="strong">Answer 12</emphasis></para>
			<para>A. Skype</para>
			</answer>
		</sect1>
		    </questions>
		<sect1>
			<title>Lab Exercise</title>
			<para><emphasis role="strong">Exercise 1</emphasis></para>
			<para>You are using the Firefox Web browser to view several interesting Web sites. You come across a Web site
			<ulink url="http://www.stevepavlina.com">http://www.stevepavlina.com</ulink>. You want to save the URL for
			future referencing. Your friend suggests creating a bookmark so that the next time when you are online, you
			can click the link that will directly take you to that Web page.</para>
			<para>In Mozilla Firefox, create a live bookmark.</para>
			<orderedlist numeration="arabic">
				<listitem><para>Open the Firefox Web browser. On the <emphasis role="strong">Bookmarks</emphasis>
				menu, click <emphasis role="strong">Organise Bookmarks</emphasis>. The <emphasis role="strong">Bookmarks
				Manager</emphasis> window is displayed.</para></listitem>
				<listitem><para>In the <emphasis role="strong">Bookmarks Manager</emphasis> window, on the
				<emphasis role="strong">File</emphasis> menu, click <emphasis role="strong">New Live Bookmark</emphasis>.
				The <emphasis role="strong">Properties for New Live Bookmark</emphasis> dialogue box is displays.</para>
				</listitem>
				<listitem><para>In the <emphasis role="strong">Properties for New Live Bookmark</emphasis> dialogue box,
				type <emphasis role="strong">Personal</emphasis> <emphasis role="strong">Development</emphasis> in the
				<emphasis role="strong">Name</emphasis> box, <ulink url="http://www.stevepavlina.com">http://www.stevepavlina.com</ulink>
				in the <emphasis role="strong">Feed Location</emphasis> box and <emphasis role="strong">My live bookmark
				</emphasis> in the <emphasis role="strong">Description</emphasis> box. Click <emphasis role="strong">OK
				</emphasis> and close the <emphasis role="strong">Bookmarks Manager</emphasis> window.</para></listitem>
				<listitem><para>In the Firefox Web browser, on the <emphasis role="strong">Bookmarks</emphasis> menu,
				point to <emphasis role="strong">My live bookmark</emphasis>. The list of feeds displays.</para>
				</listitem>
			</orderedlist>
			<para><emphasis role="strong">Exercise 2</emphasis></para>
			<para>You use Liferea as a newsreader on your computer. Recently, you met a friend who informed you about a
			Web site that offers RSS feeds, <ulink url="http://www.lifehacker.com">http://www.lifehacker.com</ulink>.
			Now, you want to configure Liferea for the latest updates from this Web site.</para>
			<orderedlist numeration="arabic">
				<listitem><para>Open the following Web site <ulink url="http://www.lifehacker.com">http://www.lifehacker.com</ulink>.
				This site offers RSS feeds.</para></listitem>
				<listitem><para>In the left pane, under <emphasis role="strong">syndication</emphasis>, click
				<emphasis role="strong">Full content (with ads).</emphasis> Save the URL in the
				<emphasis role="strong">Address bar</emphasis> of Mozilla Firefox. This URL,
				<ulink url="http://feeds.gawker.com/lifehacker/full">http://feeds.gawker.com/lifehacker/full</ulink>,
				is the feed.</para></listitem>
				<listitem><para>Open Liferea.</para></listitem>
				<listitem><para>Right-click in the left pane, point to <emphasis role="strong">New</emphasis> and click
				<emphasis role="strong">New Subscription</emphasis>. The <emphasis role="strong">New Subscription
				</emphasis> dialogue box is displayed.</para></listitem>
				<listitem><para>In the <emphasis role="strong">New Subscription</emphasis> dialogue box, type the saved
				URL <ulink url="http://feeds.gawker.com/lifehacker/full">http://feeds.gawker.com/lifehacker/full</ulink>
				and click OK.</para></listitem>
			</orderedlist>
			<para><emphasis role="strong">Exercise 3</emphasis></para>
			<para>You want to chat with your friend, who uses Google talk (gtalk). But you use Pidgin Internet Messenger to
			chat. So configure Pidgin to chat using gtalk.</para>
			<orderedlist numeration="arabic">
				<listitem><para>On the <emphasis role="strong">Applications</emphasis> menu, point to
				<emphasis role="strong">Internet</emphasis> and click <emphasis role="strong">Pidgin Internet
				Messenger</emphasis>.</para></listitem>
				<listitem><para>On the <emphasis role="strong">Accounts</emphasis> menu, click
				<emphasis role="strong">Add/Edit</emphasis>. The <emphasis role="strong">Accounts</emphasis> window
				is displayed.</para></listitem>
				<listitem><para>In the <emphasis role="strong">Accounts</emphasis> window, click
				<emphasis role="strong">Add</emphasis>. The <emphasis role="strong">Add Account</emphasis> window
				is displayed.</para></listitem>
				<listitem><para>In the <emphasis role="strong">Add Account</emphasis> window, select
				<emphasis role="strong">xmpp</emphasis> from the <emphasis role="strong">Protocol</emphasis> box, type
				your gtalk e-mail id in the <emphasis role="strong">Screen name</emphasis> box, your account password in
				the <emphasis role="strong">Password</emphasis> box and your nickname in the <emphasis role="strong">Local
				alias</emphasis> box. Click <emphasis role="strong">Save</emphasis>.</para></listitem>
				<listitem><para>You are now connected to the gtalk server.</para></listitem>
			</orderedlist>
		</sect1>
</chapter>