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<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" type="topic" style="task" id="addremove-sources" xml:lang="lt">
  <info>
    <link type="guide" xref="shell-overview#addremove"/>

    <revision version="12.04" date="2012-03-22" status="review"/>

    <credit type="author">
      <name>Ubuntu Documentation Team</name>
    </credit>

    <desc>Add other repositories to extend the software sources Ubuntu uses for installation and upgrades.</desc>
    <include xmlns="http://www.w3.org/2001/XInclude" href="legal.xml"/>
  </info>

  <title>Add additional software repositories</title>
  <p>Software is available from third-party sources, as well as from the default Ubuntu software repositories. If you want to install software from a third-party software repository, you must add it to Ubuntu's list of available repositories. </p>

  <note style="warning"><p>Only add software repositories from sources that you trust!</p>
  <p>Third-party software repositories are not checked for security or reliability by Ubuntu
  members, and may contain software which is harmful to your computer.</p></note>

    <steps>
        <title>Install other repositories</title>
        <item><p>Click on the <app>Ubuntu Software Center</app> icon in the Launcher, or search for Ubuntu Software 
        Center in the search bar of the <app>Dash</app>.</p></item>
        <item><p>When the Software Center launches, click <guiseq><gui>Edit&gt;</gui><gui>Software Sources</gui></guiseq></p></item>
        <item><p>You will be asked to enter your password. Once you have done that, switch to the <gui>Other Software</gui> tab.</p></item>
        <item><p>Click <gui>Add</gui> and enter the APT line for the repository. This should be available from the website of the repository, and should look similar to:</p>
        <p><code>deb http://archive.ubuntu.com/ubuntu/ precise main</code></p></item>
        <item><p>Click <gui>Add Source</gui> then close the Software Sources window. Ubuntu Software Center will then check your software sources for new updates.</p></item>
    </steps>

  <section id="canonical-partner">
    <title>Activate the Canonical Partner repository</title>
    <p>The Canonical Partner repository offers some proprietary applications that don't cost any money to use but are closed source. They include software like <app>Skype</app>, <app>Adobe Reader</app> and <app>Adobe Flash Plugin</app>. Software in this repository will appear in Ubuntu Software Center search results but won't be installable until this repository is enabled.</p>
    <p>To enable the repository, follow the steps above to open the <gui>Other Software</gui>
tab in <app>Software Sources</app>. If you see the <gui>Canonical Partners</gui> repository in
the list, make sure it is checked then close the Software Sources window. If you don't see it,
click <gui>Add</gui> and enter:</p>
    <p><code>deb http://archive.canonical.com/ubuntu precise partner</code></p>
   <p>Click <gui>Add Source</gui> then close the Software Sources window. Wait a moment for
Ubuntu Software Center to download the repository information.</p>
  </section>

</page>