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xmlns:its="http://www.w3.org/2005/11/its"
type="topic" style="task"
id="addremove-sources">
<info>
<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 href="legal.xml" xmlns="http://www.w3.org/2001/XInclude"/>
<link type="guide" xref="addremove"/>
<revision version="16.04" date="2016-03-13" status="review"/>
</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>Software</app> icon in the Launcher, or
search for <input>Software</input> in the search bar of the
<app>Dash</app>.
</p>
</item>
<item>
<p>
When <app>Software</app> launches, click <gui>Software & Updates</gui>
</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 its:translate="no">deb http://archive.ubuntu.com/ubuntu/ xenial main</code>
</p>
</item>
<item>
<p>
Click <gui>Add Source</gui> then close the <app>Software & Updates</app> window.
<app>Software</app> 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
<app>Software</app> 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 & Updates</app>. If you see the
<gui>Canonical Partners</gui> repository in the list, make sure it is
checked then close the <app>Software & Updates</app> window. If you don't see it, click
<gui>Add</gui> and enter:
</p>
<p>
<code its:translate="no">deb http://archive.canonical.com/ubuntu xenial partner</code>
</p>
<p>
Click <gui>Add Source</gui> then close the <app>Software & Updates</app> window. Wait a
moment for <app>Software</app> to download the repository information.
</p>
</section>
</page>
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