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<sect1 id="keep-safelock-screen" status="complete">
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<title>Lock your screen while away</title>
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Locking your screen prevents other people from accessing your computer while you
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are away from it. All of your applications and work remain open while the screen
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is locked, and the screensaver is displayed.
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You can lock your screen in one of the following ways:
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<title>Locking the screen while away</title>
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Locking the screen discourages people from accessing an unattended computer. All
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applications and work remain open while the screen is locked, and the selected
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screensaver is displayed.
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The screen can be locked in one of the following ways:
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<keycap>Alt</keycap>
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<keycap>Ctrl</keycap>
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<!-- FIXME: menukbandmouse is not defined
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to lock the screen. This keyboard shortcut can be changed in
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<application>System Settings</application> under the <guilabel>Keyboard &
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Mouse</guilabel>. To access this go to &menukbandmouse; and under the
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<guilabel>Keyboard Shortcuts</guilabel> section, <guilabel>Global
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Shortcuts</guilabel> tab, locate the <guilabel>Lock Session</guilabel> under
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<guilabel>Desktop</guilabel>.
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<mousebutton>Right-click</mousebutton> in an empty space on the desktop and
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choose <guimenuitem>Lock Screen</guimenuitem>.
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You can add a <guibutton>Lock Screen</guibutton>
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button to the <application>Kicker</application> for easy access. Right-click
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the <application>Kicker</application>, select <guibutton>Add Applet
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to Panel...</guibutton> and select the <guibutton>Lock/Logout
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Buttons</guibutton> item, and then press the <guibutton>Add to
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Panel</guibutton> button.
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To unlock the screen, move the mouse or press a key. Then, type your password
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and either press the <keycap>Return</keycap> key or press the
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<note><title>Change lock screen shortcut</title>
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Keyboard shortcuts can be changed in <application>System Settings</application>
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under the <guilabel>Keyboard & Mouse</guilabel>. To access these settings,
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go to Menu Bread Crumbs. Select <guilabel>Global Keyboard Shortcuts</guilabel>,
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in the KDE component dropdown, select <guilabel>Run Command Interface</guilabel>
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and locate <guilabel>Lock Session</guilabel>.
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<note><title>Adding a lock screen button to the panel</title>
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A <guibutton>Lock Screen</guibutton> button can be added to the
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<application>Panel</application> for quick and easy screen locking. Right-click
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the <application>Panel</application>, select <guibutton>Add
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Widgets...</guibutton>, select <guibutton>Lock/Logout</guibutton> and drag it
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to the proper location on the Panel.
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To unlock the screen, move the mouse or press a key. Enter the password, and
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either press the <keycap>Return</keycap> key or press the
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<guibutton>Unlock</guibutton> button.
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If more than one person has a user account on your computer and the screen is
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locked, other users can press the <guibutton>Switch user...</guibutton> button
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to use the computer, even while the screen is locked. They will be unable to
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access your currently-open work, and you will be able to switch back to your
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locked session when they have finished using the computer.
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If more than one person has a user account on the computer and the screen is
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locked by one user, other users can press the <guibutton>Switch
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user...</guibutton> button to unlock the screen for their own accounts. They
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will not be able to access currently-open work in locked accounts. Users with
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locked screens can switch back to their own accounts and unlock their screens
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when the computer becomes available.
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114
<sect1 id="keep-safe-avoid-internet-crime" status="complete">
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115
<title>Avoid Internet nuisances and crime</title>
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<para>From time to time, you may be sent an email which carries a
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virus or links to a fraudulent website. This type of email is very common, and
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it is important to learn how to deal with it, in order to prevent your computer
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or your personal details from being compromised or misused.
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Such messages are often received from total strangers. However, sometimes an
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email may appear to be from someone you know, when really it is not. This is
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because it is possible to include a fake sender email address in emails.
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Unwanted (unsolicited) mail tends to fall in to one of several categories:
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<para>From time to time, email messages carry viruses or links to fraudulent
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websites. It is important to learn how to deal with these messages, in order to
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prevent the computer or personal information from being compromised or misused.
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Typically such messages are sent by strangers. However, sometimes this type of
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email appears to be from a trusted acquaintance, even though that person did not
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really send it. It is possible to include a fake sender email address in emails.
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Unwanted (unsolicited) mail tends to fall into one of several categories:
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Spam (junk) email, where people offer unwanted services and products
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Scam emails, where people pretend to ask for help in exchange for large sums of
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Phishing email, where the message appears to be from a bank or other online
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service, asking you to enter your personal and financial details, or passwords.
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Spam (junk) email with offers for unwanted services and products
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Scam emails asking for help in exchange for money
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Phishing email that appears to be from a bank or other online service, asking
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for personal and financial details, or passwords
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You should never reply to unsolicited mail, or even click on the links in the
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mail. Doing so usually results in more junk mail being sent to you.
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Never click on links in emails which lead to websites asking for your password
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or similar. It is possible for the text of the link to give one address, when
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really it opens up another (possibly dangerous) address. Instead, type the link
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into your web browser yourself and proceed from there.
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When visiting a website that asks for your financial information, ensure that
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it is secure. In <application>Konqueror</application> and in
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<application>Firefox</application> there are two areas that will provide
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notification if the current page is secure. The first area is the address bar.
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If the page is a secure page, the address bar will have a yellow background as
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well as a lock to the right of the address. The second area is the status bar
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which is located at the bottom right of each browsers window. If the page is a
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secure page, a lock will appear in this area. Clicking on either of the locks
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will provide you with a dialog that will explain in detail the type of licensing
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and security for that page.
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Only download and run software from sources that you trust. By default, you can
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only download software directly from Ubuntu.
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Never reply to unsolicited mail or click on the links in the mail. Doing so
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usually results in more junk email.
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Never click on links in emails that lead to websites asking for passwords or
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similar information. It is possible for the text of the link to show one
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address, but clicking on the link actually connects to a different (possibly
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dangerous) address. Instead of clicking a potentially misleading link, type the
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link address directly into a web browser.
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When visiting a website that asks for financial information, ensure that it is
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secure. <application>Konqueror</application> and
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<application>Firefox</application> are two browsers commonly used in &kubuntu;.
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Both have two areas that indicate if the current page is secure. On secure
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webpages, the address bar will have a yellow background and a lock
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symbol to the right of the address. The second area is the status bar located at
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the bottom right of the browser window. If the page is secure, a lock icon will
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appear in this area. Clicking on either of the lock symbols will produce a
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dialog that explains the type of licensing and security for that page.
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Only download and run software from trusted sources. By default, software can
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only be downloaded directly from Ubuntu.
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<sect1 id="keep-safe-backup-files" status="complete">
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<title>Make backup copies of your files</title>
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<title>Make backup copies of files</title>
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A problem which you may occasionally encounter is the unexpected loss of some of
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your work and settings for one reason or another. The causes of such
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<emphasis>data loss</emphasis> are many and varied; it could be anything from a
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power cut to accidentally deleting a file. It is highly recommended that you
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make regular back-up copies of your important files so that, if you do encounter
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a problem, you will not have lost those files.
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Occasionally users lose computer information. There are many possible causes
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for such unforeseen <emphasis>data loss</emphasis>. The problem could be
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anything from a power loss or equipment failure to accidentally deleting a file.
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With regular backup copies, if a problem should occur, it may be possible
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to retrieve important files. Users are strongly encouraged to make backups.
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It is wise to store back-up copies of files separately from
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your computer; that is, you should make use of some form of file storage which
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is not permanently attached to your computer. Options include:
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Backup copies of files should be stored separately from the computer. In other
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words, backup file storage should be located somewhere that is not permanently
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attached to the computer. Options include:
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<listitem><para>Writable CDs and DVDs</para></listitem>
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<listitem><para>Another computer on the network</para></listitem>
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A simple way of backing-up your files is to manually copy them to a safe
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location (see above) by using <application>Konqueror</application>.
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A simple way of backing up your files is to copy them manually to a safe
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location (see above) by using the <application>Konqueror</application> or
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<application>Dolphin</application> file manager.
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Alternatively and the preferred way, is that you can use
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<application>Keep</application>, the dedicated KDE backup solution. Access
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<application>Keep</application> by going to &menukeep;.
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Another backup method is <application>Keep</application>, an automated &kubuntu;
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backup solution, preferred by many &kubuntu; veterans. To install the
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<application>Keep</application> package, please refer to the <ulink
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type="help" url="help:/kubuntu/manage-software/">Adding Applications</ulink>
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document for help on installing applications. Once installed,
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<application>Keep</application> can be launched by going to &menukeep;.