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91.
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There are thousands of programs available to install on Ubuntu. These programs are stored in software repositories and are made freely available for all Ubuntu users. This makes it very easy to install new programs, and it is also very secure because each program you install is built specially for Ubuntu and checked before it is allowed into the repositories.
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(no translation yet)
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Located in
add-applications/C/add-applications.xml:447(para)
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92.
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Software repositories
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(no translation yet)
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Located in
add-applications/C/add-applications.xml:456(title)
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93.
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To organize the software, Ubuntu repositories are categorized 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:457(para)
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94.
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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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95.
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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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96.
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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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97.
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Update repositories
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(no translation yet)
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Located in
add-applications/C/add-applications.xml:489(title)
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98.
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The Update Manager automatically finds software updates for your computer when they are available. It regularly gathers information on potential updates from a number of online update sources.
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(no translation yet)
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Located in
add-applications/C/add-applications.xml:490(para)
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99.
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If you click <menuchoice><guimenu>System</guimenu><guimenuitem>Administration</guimenuitem><guimenuitem>Software Sources</guimenuitem></menuchoice> and select the <guilabel>Updates</guilabel> tab, you will notice that four update sources are available. An explanation for each of these is provided below:
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(no translation yet)
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Located in
add-applications/C/add-applications.xml:495(para)
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100.
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<emphasis role="strong">Important security updates:</emphasis> Updates which fix critical security flaws are made available through this source. It is recommended that all users leave this source enabled (it should be enabled by default).
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(no translation yet)
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Located in
add-applications/C/add-applications.xml:502(para)
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