Editing Manual/Upgrading (section)

===Can my wiki stay online while it is upgrading?=== <!--T:136-->

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Generally yes, however if you upgrade via Git, Git may temporarily (for a few seconds) break it.

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If you are upgrading between minor releases of MediaWiki, all you need to do is update the source files.

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Note: the following assumes you have command line access. If you are upgrading between major releases of MediaWiki, the preferred procedure is as follows:
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# <translate><!--T:140--> Unpack the new version of MediaWiki into a new directory</translate>
# <translate><!--T:201--> Prepare that new directory: copy your current <tvar name=1><code>LocalSettings.php</code></tvar> from the old directory, copy any installed extensions and custom skins (if any).</translate> <translate><!--T:599--> Check <tvar name=1></tvar> and <tvar name=2></tvar> settings in <tvar name=3><code>LocalSettings.php</code></tvar> and if necessary copy logo file from the old directory to the new directory.</translate>
# <translate><!--T:202--> In the release notes for the new version, see if any changes need to be made to <tvar name=1><code>LocalSettings.php</code></tvar>.</translate>
# <translate><!--T:579--> In the old directory, edit <tvar name=1>LocalSettings.php</tvar> and insert the following code.</translate> <translate><!--T:580--> This will place the database in read-only mode for regular wiki activity, without restricting your own update actions.</translate> <translate><!--T:581--> Users will see the message provided if they attempt an edit during the upgrade process:</translate><br /><div class="mw-highlight mw-highlight-lang-php"><div class="mw-code">$adminTask = (  ===  || (  ) );<br /> = $adminTask ?  : '|class=s1}};</div></div>
# <translate><!--T:205--> Run the [[<tvar name=upg>Special:MyLanguage/Manual:Upgrading#Command_line_2</tvar>|update script]] or the web updater in the new directory.</translate>
# <translate><!--T:206--> Copy the images from the images sub-directory from the old directory to the new directory.</translate>
# <translate><!--T:207--> Swap the old directory and the new directory.</translate> <translate><!--T:582--> (This will make the database writable again, because <tvar name=1></tvar> was only set in the old directory's <tvar name=2>LocalSettings.php</tvar>.)</translate>

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