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28.
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There are thousands of programs available to install on Ubuntu. These programs are stored in software archives (<emphasis>repositories</emphasis>) and are made freely available for installation over the Internet. This makes it very easy to install new programs in Linux, and it is also very secure, because each program you install is built specially for Ubuntu and checked before it is installed.
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(no translation yet)
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29.
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To organise the software, Ubuntu repositories are categorised into four groups: <emphasis>Main</emphasis>, <emphasis>Restricted</emphasis>, <emphasis>Universe</emphasis>, and <emphasis>Multiverse</emphasis>. The rationale used to determine which software goes into which category is based on the level of support that software development teams provide for a program and the level of compliance the program has to the <ulink url="http://www.ubuntu.com/ubuntu/philosophy">Free Software Philosophy</ulink>.
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(no translation yet)
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Located in
add-applications/C/add-applications.xml:111(para)
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30.
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The standard Ubuntu Install CD contains some software from the <emphasis>Main</emphasis> and <emphasis>Restricted</emphasis> categories.
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(no translation yet)
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Located in
add-applications/C/add-applications.xml:466(para)
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31.
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If your system is connected to the Internet, many more software programs are made available for installation. For example, the <quote>Universe</quote> and <quote>Multiverse</quote> repositories are only available over the Internet.
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(no translation yet)
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Located in
add-applications/C/add-applications.xml:470(para)
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32.
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The <emphasis>Multiverse</emphasis> repository contains software which has been classified as <emphasis>non-free</emphasis>. This software may not be permitted in some jurisdictions. When installing each package from this repository, you should verify that the laws of your country permit you to use it. Also, this software may not include security updates.
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(no translation yet)
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Located in
add-applications/C/add-applications.xml:477(para)
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33.
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You can find more information about the Repositories available <ulink url="http://www.ubuntu.com/ubuntu/components">on the website</ulink>.
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(no translation yet)
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Located in
add-applications/C/add-applications.xml:142(para)
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34.
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Adding extra repositories
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(no translation yet)
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Located in
add-applications/C/add-applications.xml:148(title)
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35.
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It is possible to add extra repositories, such as those provided by third parties or those for older version of Ubuntu.
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(no translation yet)
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Located in
add-applications/C/add-applications.xml:149(para)
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36.
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Be careful when installing software from third-party repositories. It may not have been tested with Ubuntu and could cause your system to break.
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(no translation yet)
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Located in
add-applications/C/add-applications.xml:155(para)
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37.
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Open <menuchoice><guimenu>System</guimenu><guimenuitem>Administration</guimenuitem><guimenuitem>Software Sources</guimenuitem></menuchoice> and press <guilabel>Third Party Software</guilabel>.
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(no translation yet)
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Located in
add-applications/C/add-applications.xml:164(para)
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