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\section{Updates and upgrades}
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\label{sec:updates-and-upgrades}
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\credit{author}{Thomas Corwin}{13.10}
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\credit{author}{Jim Connett}{13.10}
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\credit{editor}{Sylvie Gallet}{13.10}
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\credit{editor}{Chris Woollard}{14.04}
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\credit{editor}{Sylvie Gallet}{14.04}
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\status{13.10}{2013-09-14}{review}
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\status{13.10}{2013-09-16}{candidate}
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\status{14.04}{2014-11-11}{final}
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Ubuntu also allows you to decide how to manage package updates through the \tab{Updates} tab in the \application{Software \& Updates} window.
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\subsection{Ubuntu updates}
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\indexstart{updates!about}
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In this section, you are able to specify the kinds of updates you wish to install on your system. The type of update usually depends upon your preferences with regards to system stability versus having access to the latest developments.
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\screenshot{05-software-updater.png}{ss:softwareupdaterwindow}{You can update installed software by using the Software Updater application in Ubuntu.}
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\item[Important security updates (trusty-security)] These updates are highly recommended to ensure your system remains as secure as possible. These updates are enabled by default.
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\item[Recommended updates (trusty-updates)] These updates are not as important in keeping your system secure. Rather, updates listed in this section will keep your software updated with the most recent bug fixes or minor updates that have been tested and approved. This option is also enabled by default.
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\item[Pre-released updates (trusty-proposed)] This option is for those who would rather remain up-to-date with the very latest releases of applications at the risk of installing an update that has unresolved bugs or conflicts. Note that it is possible you will encounter problems with these updated applications, therefore, this option is not enabled by default.
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\item[Unsupported updates (trusty-backports)] These are updates that have not yet been fully tested and reviewed by Canonical. Some bugs may occur when using these updates, and so this option is also not enabled by default.
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\indexend{updates!about}
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\subsection{Automatic updates}
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\index{updates!automatic}
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The middle section of this window allows you to customize how your system manages updates, such as the frequency with which it checks for new packages, as well as whether it should install important updates right away (without asking for your permission), download them only, or just notify you about them.
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\subsection{Release upgrade}
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\indexstart{updates!release updates}
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At the bottom of the \menu{Updates} tab in the \application{Software \& Updates} window, you will see a dropdown box labeled \menu{Notify me of a new Ubuntu version:}. This option allows you to tell Ubuntu how you would like to handle release updates. This dropdown box contains the following options for notification:
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\item[Never] Choose this option if you would rather not be notified about any new Ubuntu releases.
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\item[For any new version] Choose this option if you always want to have the latest Ubuntu release, regardless of whether it is a long-term support release or not. This option is recommended for normal home users.
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\item[For long-term support versions] Choose this option if you need a release that will be more stable and have support for a longer time. If you use Ubuntu for business purposes, you may want to consider selecting this option.
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Canonical will release a new version of the Ubuntu operating system every six months. Almost every release is a \define{normal release}. However, every fourth release\dash or every 2 years\dash Canonical releases a \define{long-term support} (\acronym{LTS}) version of the operating system. Long-term support releases are intended to be the most stable releases available and are supported for a longer period of time. Ubuntu 14.04 is an LTS release. Ubuntu 14.10 is a normal release.
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\indexend{updates!release updates}
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software-management/updates-and-upgrades.tex
