~ricardo-cropalato/ubuntu-desktop-course/ubuntu-desktop-course-pt-br-ricardo-cropalato

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<chapter>
		<title>Using the Internet</title>
		<para><emphasis role="strong">Objectives</emphasis></para>
		<para>In this lesson, you will learn to:</para>
		<itemizedlist>
			<listitem><para>Connect to the Internet</para></listitem>
			<listitem><para>Browse the Web</para></listitem>
			<listitem><para>Access various news sources</para></listitem>
			<listitem><para>Send and receive e-mail messages</para></listitem>
			<listitem><para>Use various tools for instant messaging</para></listitem>
			<listitem><para>Make phone calls using Softphones</para></listitem>
		</itemizedlist>
		<instructornote><title>Instructor Notes:</title><para><emphasis role="italic">It is recommended to cover all 
		the topics in this lesson. However, if you are running short on time, you can omit the following optional topics:
		Using Dial-up, Alternative E-mail Client and WengoPhone.</emphasis></para>
		</instructornote>
		<sect1>
			<title>Connecting to and Using the Internet</title>
			<para>The Internet is used daily by millions of people for work and entertainment. Searching for
			information all over the world, corresponding with friends
			and relatives, participating in discussion forums, reading the news, playing games,
			has never been easier... or more accessible.</para>
			<para>The means of connecting to the Internet is not always a choice and depends greatly on where you live and/or work
 			and the surrounding infrastructure. The pre-requisites to connect to the Internet are an Internet Service Provider (ISP) subscription and a functional Internet connection in your area.
 			Configuring the Internet connection requires minimal involvement from you. Ubuntu supports most connection types, this
 			lesson  will cover: Broadband (cable or ASDL), dial-up and direct access through Local Area Network (LAN).</para>
			<tip><title><emphasis role="strong">Nice to Know:</emphasis></title>
			<para>Broadband refers to either Asymmetric Digital Subscriber Line (ADSL) or a DOCSIS connection (television cable).</para> 
			<para>Ethernet Modem (PPPoE) uses a modem connected to the computer with an Ethernet network cable.  
				It is generally used in conjunction with Broadband connection.</para>
			<para>Dial-up uses dial-up connection, and is limited to 56 kbit/s or slower.</para> 
			<para>Local Area Network (LAN) uses Ethernet or wireless, and is generally also used in conjunction with a Broadband connection.</para>
			<para>Mobile Phone uses modem functionality integrated into modern mobile phones.</para></tip>
			<para>Broadband connections are fast and reliable connections that users subscribe to
			for a fixed monthly fee. Broadband companies offer packages with different speed
			specifications and bandwidth limits. If you travel and need Internet access, you
			can purchase a wireless Internet connection. If your computer does not have one pre-installed, 
			you will need to install a wireless card. This connection is similar to a satellite connection, where data is
			transmitted through the airwaves.</para>
			<para>Dial-up access uses the same lines as your phone connection, except that the parties at the two ends are computers. This is a slow and cheap connection 
			that uses a phone line to connect to a local server. Your computer dials a phone number that is provided by your ISP and
			connects to the server. Consequently, you cannot make phone calls while you are connected to the Internet.  This is oldest and slowest means of connecting; carrying out many functions
			using this mode can be very tedious and frustrating.</para>
			<sect2>
				<title>Network Manager</title>
			<para>The Network Manager on Ubuntu is a simple to use and powerful utility to stay connected with wired and wireless adapters. It is located on the top menubar at the outer right corner.
			A left-click will reveal if your computer is already connected to a wired or wireless network. In case of a wireless network that is protected by a password, a dialogue will appear and ask for the password.
			The password can then be stored in your keyring, where it will automatically be used when needed. However, you may be asked for your keyring password if you have to log out.</para> 
			<figure id="fig:network-manager"><title><emphasis role="italic">Network Manager</emphasis></title>
				<mediaobject><imageobject>
					<imagedata fileref="images/Lesson04_images_001.png" format="PNG" />
				</imageobject></mediaobject>
			</figure>
			<para>You can also right-click on Network Manager to enable and disable wireless and wired connections.
			The connection information allows access to the network parameters currently used.</para>
			<figure id="fig:network-manager-connection"><title><emphasis role="italic">Network Manager Connection</emphasis></title>
				<mediaobject><imageobject>
					<imagedata fileref="images/Lesson04_images_002.png" format="PNG" />
				</imageobject></mediaobject>
			</figure>
			<para>If Network Manager does not automatically configure your network connections, you can fall back to manually configuring them.</para>
			</sect2>
			<sect2>
				<title>Using a Cable Connection</title>
				<para>To connect to the Internet using a cable connection:</para>
				<orderedlist numeration="arabic">
					<listitem><para>On the <emphasis role="strong">System</emphasis> menu, point
					to <emphasis role="strong">Administration</emphasis> and click
					<emphasis role="strong">Network</emphasis>. The
					<emphasis role="strong">Network Settings</emphasis> dialogue box will be
					displayed.</para>
					<figure id="fig:network-menu"><title><emphasis role="italic">Accessing Network Settings</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_003.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					
					</listitem>
					<listitem><para>On the <emphasis role="strong">Connections</emphasis> page,
					select the connection to use. Click <emphasis role="strong">Properties</emphasis>. 						The <emphasis role="strong">eth0 Properties</emphasis> dialogue box will be displayed.</para>
					<figure id="fig:network-settings"><title><emphasis role="italic">Network Settings</emphasis></title>
						<mediaobject><imageobject>
							<imagedata fileref="images/Lesson04_images_004.png" format="PNG" />
						</imageobject></mediaobject>
					</figure>
					</listitem>
					<listitem><para>Clear the <emphasis role="strong">Enable roaming mode</emphasis>
					check box to enable the connection.</para>
					<note><title><emphasis role="strong">Note:</emphasis></title>
					<para>Your Internet Service Provider (ISP) or network administrator should provide you with 
					an IP address, subnet mask and gateway address which need to be specified in the
					connection information.</para></note>
					<orderedlist numeration="loweralpha">
						<listitem>
							<para>In the <emphasis role="strong">Configuration</emphasis> box,
							select the <emphasis role="strong">Static IP address</emphasis>
							option.</para>
							</listitem>
							<listitem><para>Type the IP address of your computer in the
							<emphasis role="strong">IP address</emphasis> box.</para></listitem>
							<listitem><para>Type the subnetwork (subnet) mask of your computer's
							IP address in the <emphasis role="strong">Subnet mask</emphasis>
							box.</para>
							<note><title><emphasis role="strong">Note:</emphasis></title>
							<para>A subnet mask divides a network of IP
							addresses into groups, which facilitates routing
							of data.</para></note>
							</listitem>
							<listitem><para>Type the IP address of your ISP in the
							<emphasis role="strong">Gateway address</emphasis> box.</para>
							<note><title><emphasis role="strong">Note:</emphasis></title>
							<para>A gateway is a device that connects a user to the Internet.
							It is provided by the ISP.</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>Click <emphasis role="strong">OK</emphasis> to complete the
					configuration for the cable connection.</para>
						<figure><title><emphasis role="italic">Network Settings</emphasis></title>
							<mediaobject><imageobject>
								<imagedata fileref="images/Lesson04_images_006.png" format="PNG" />
							</imageobject></mediaobject>
						</figure> 
					<para>Now, you can connect to the Internet by using the cable.</para>
				</listitem>
				</orderedlist>
			</sect2>
			<sect2>
				<title>Using a Wireless Card</title>
				<para>Ubuntu automatically detects support for various wireless cards. To determine
				whether Ubuntu supports the wireless card on your computer:</para>
				<orderedlist numeration="arabic">
					<listitem><para>On the <emphasis role="strong">System</emphasis> menu, point
					to <emphasis role="strong">Administration</emphasis> and then click
					<emphasis role="strong">Network</emphasis>. The <emphasis role="strong">Network
					Settings</emphasis> dialogue box will be displayed.</para></listitem>
					<listitem><para>If the wireless card on your computer is listed, you can use
					the same procedure as listed in the <emphasis role="strong">Using Cable Connection</emphasis>
					section to connect to the Internet.</para>
					<figure id="fig:wireless"><title><emphasis role="italic">Choosing a Wireless Connection</emphasis></title>
				<mediaobject><imageobject>
					<imagedata fileref="images/Lesson04_images_007.png" format="PNG" />
					</imageobject></mediaobject>
				</figure>
				<para>Alternatively, left-click on Network Manager and discover any detected wireless 					networks in range.</para>
				</listitem>
				</orderedlist>
				<tip><title><emphasis role="strong">Nice to Know:</emphasis></title>
				<para>To view the complete list of wireless cards that work with Ubuntu, refer to:
				<ulink url="https://help.ubuntu.com/community/WifiDocs/WirelessCardsSupported">https://help.ubuntu.com/community/WifiDocs/WirelessCardsSupported</ulink></para></tip>
				<para>Some wireless cards are not listed on the Ubuntu Web site because
				open source drivers for these are not available. Therefore, these
				cards do not work automatically with Ubuntu. If your wireless network card
				does not have an open source driver, you can make it work by using
				ndiswrapper.</para>
				<para><emphasis role="strong">Using Ndiswrapper with a Wireless Card</emphasis></para>
				<para>Ndiswrapper is a Linux module that allows Ubuntu to use Microsoft Windows drivers for wireless cards.
				The utility to configure ndiswrapper can be installed comfortably via <emphasis role="strong">Add/Remove Applications</emphasis>. The <emphasis role="strong">Windows Wireless Drivers</emphasis> setup programme can be found in <emphasis role="strong">System Administration</emphasis>.</para>
			</sect2>
			<sect2>
				<title>Using a Dial-up Connection</title>
				<para>A dial-up connection uses a modem to connect to the Internet. You can use
				the ScanModem tool to identify the type of modem. This tool recognises the type
				of modem-whether it is a Peripheral Component Interconnect (PCI) or a Universal
				Serial Bus (USB) modem. </para>
				<tip><title><emphasis role="strong">Nice to Know:</emphasis></title>
				<para>To download the ScanModem tool, refer to:
				<ulink url="https://help.ubuntu.com/community/DialupModemHowto/ScanModem">https://help.ubuntu.com/community/DialupModemHowto/ScanModem</ulink></para></tip>
				<para>To use a dial-up connection:</para>
				<orderedlist numeration="arabic">
					<listitem><para>Download, configure and install your modem's driver. If an
					open source driver is not available, contact your vendor for other
					options.</para>
					<note><title><emphasis role="strong">Note:</emphasis></title>
					<para>To download the open source driver, refer to
					<ulink url="www.modemdriver.com">www.modemdriver.com</ulink>.</para></note>
					</listitem>
					<listitem><para>Configure the dial-up connection to your ISP:</para>
						<orderedlist numeration="arabic">
							<listitem><para>On the <emphasis role="strong">System</emphasis>
							menu, point to <emphasis role="strong">Administration</emphasis>
							and click <emphasis role="strong">Network</emphasis>. The
							<emphasis role="strong">Network Settings</emphasis> dialogue box
							will be displayed.</para></listitem>
							<listitem><para>In the <emphasis role="strong">Network Settings</emphasis>
							dialogue box, select <emphasis role="strong">Modem connection</emphasis>
							and click <emphasis role="strong">Properties.</emphasis> The
							<emphasis role="strong">ppp0 Properties</emphasis>
							dialogue box will be displayed.</para>
						<figure id="fig:modem"><title><emphasis role="italic">Network Settings</emphasis></title>
							<mediaobject><imageobject>
								<imagedata fileref="images/Lesson04_images_009.png" format="PNG" />
							</imageobject></mediaobject>
						</figure>
							</listitem>
							<listitem><para>In the <emphasis role="strong">ppp0 Properties</emphasis>
							dialogue box, select the <emphasis role="strong">Enable this connection</emphasis>
							check box to activate the connection.</para></listitem>
						</orderedlist>
						
						<orderedlist numeration="loweralpha">
							<listitem><para>Specify your ISP's information and your account
							information, which you can obtain form your ISP.</para>
							<para>Type the phone number in the <emphasis role="strong">Phone number</emphasis>
							and the dial prefix in the <emphasis role="strong">Dial prefix</emphasis>
							box, which the modem uses to connect to the server. Type your dial-up
							account name in the <emphasis role="strong">Username</emphasis> box
							and the password in the <emphasis role="strong">Password</emphasis>
							box. The user name is the one that is registered with your ISP.</para>
							</listitem>
							<listitem><para>Specify the modem setting on the Modem tabbed page. Click the
							<emphasis role="strong">Modem</emphasis> tab. Type or select the modem port in the
							<emphasis role="strong">Modem port</emphasis> box. Select the dial type from the
							<emphasis role="strong">Dial type</emphasis> box. You can select the types of phone
							dial used in the <emphasis role="strong">Dial type</emphasis> box. Dial type depends
							on your phone company and may be <emphasis role="strong">Tones</emphasis> or
							<emphasis role="strong">Pulses</emphasis>. If you do not know which dial type to choose,
							contact your phone company. Irrespective of the dial type, the modem will make some noise
							while connecting to the ISP server. You can set the volume of this noise by selecting the
							appropriate volume options from the <emphasis role="strong">Volume</emphasis> box-it is
							recommended that you select <emphasis role="strong">Off</emphasis> or
							<emphasis role="strong">Low</emphasis>.</para>
							</listitem>
							<listitem><para>Specify the connection settings. Click the
							<emphasis role="strong">Options</emphasis> tab and select the <emphasis role="strong">Set
							modem as default route to Internet</emphasis> check box to specify the dial-up modem as
							the default Internet connection. If you use a laptop on a local area network (LAN), clear
							the <emphasis role="strong">Set modem as default route to Internet</emphasis> check box. Select this option only if you use
							a dial-up connection.</para>
							<para>As part of modem connection settings, you need to assign a host name to an IP
							node to identify it as a TCP/IP host. You can select your ISP server for this name
							resolution of hosts, which maps a host name to an IP address successfully.
							For this, select the <emphasis role="strong">Use the Internet service provider
							nameservers</emphasis> check box.</para>
							<para>If the Internet connection breaks, your modem will automatically try reconnecting
							to the Internet if the <emphasis role="strong">Retry if the connection breaks or fails
							to start</emphasis> check box is selected.</para></listitem>
							<listitem><para>Click <emphasis role="strong">OK</emphasis> to complete the dial-up
							configuration.</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>Now, you can connect to the Internet using a dial-up connection.</para>
			
				<instructornote><title>Instructor Notes:</title><para><emphasis role="italic">If students need to connect to the Internet with the modem integrated
				into a mobile phone or configure Point-to-Point (PPP) dial-up through a Bluetooth-compatible mobile
				phone, refer to: <ulink url="https://help.ubuntu.com/community/BluetoothDialup">https://help.ubuntu.com/community/BluetoothDialup</ulink></emphasis></para>
				<para><emphasis role="italic">To connect to the Internet through a mobile phone over a USB cable, refer to:
				<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 Newsreaders</title>
			<para>Newsreaders are programmes that allow you to read newsgroups. Newsgroups correspond to notice boards where
			people post comments and discuss subjects of mutual interest. Anyone can participate in this discussion and
			post their thoughts. Newsgroups cover almost any topic, such as computers, social issues, literature and
			science, job postings etc. It is a fast and easy way to communicate with
			people from all over the world.</para>
			<tip><title><emphasis role="strong">Nice to Know:</emphasis></title>
			<para>Newsgroups or forums were originally developed so that
			scientists could post questions and answers.</para></tip>
			<para>Newsgroups are comparable to e-mail lists; if you are interested in a group, instruct your newsreader to subscribe 
			you to that group. Your newsreader adds this group to your subscribed list and then, makes this group more accessible and
			saves information, such as which messages you have already read and much more. When you open this newsgroup to read, there 
			will be a bunch of messages from several people. You will have something that looks similar to your e-mail inbox. The 
			difference is that the message is addressed to the group you were interested in and not to you.  Similarly, if you select
			to post a message in response to a message you are reading, you need to decide whether to reply to the newsgroup, to author or to both. So, it is your choice to use newsgroup or mailing list to read messages. Some people prefer not to have messages arriving by e-mail all the time, and others prefer visiting groups when they wish to, rather than reading every message. The news server posts expire after a certain amount of time. This time is determined by the person running the server.</para> 
			<note><title><emphasis role="strong">Note:</emphasis></title> 
<para>
USEr NETwork (Usenet) is the main source of newsgroups and newsfeeds. Usenet is an Internet discussion system where people read and post e-mail-like messages called posts to one or more of a number of categories called newsgroups. News feeds 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 designed to be read by computers rather than people.</para></note>
			<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. In this section we will cover two types of Newsreaders, Linux feed reader (Liferea) and Thunderbird.</para>
			
			
			<sect2>
				<instructornote><title>Instructor Notes:</title><para><emphasis role="italic"> While teaching, perform the steps to access Liferea and
				Thunderbird.</emphasis></para>
				</instructornote>
				<title>Liferea Newsreader</title>
				<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 by using the Synaptic
				Package Manager by following the procedure described in
				<emphasis role="strong">Using Alternative E-Mail Client</emphasis>
				section to install Liferea.</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 Programs. 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 
						Programs 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>