PmWiki is designed to make it easy to upgrade the PmWiki software without affecting your existing data files or installation.

To upgrade PmWiki:

0. If you're upgrading to a new major release (a release where the second number changes, as in going from 0.5.27 to 0.6.0), then carefully read the PmWiki:ReleaseNotes before performing an upgrade to see if there are any significant changes or preparation tasks that must be handled before performing the upgrade.

1. It's always a good idea to have a backup copy of your existing PmWiki installation before starting. You can copy the entire directory containing your existing installation, or you can just make copies of the wiki.d directory and any other local customization files you may have created (e.g., config.php, localmap.txt, etc.).

2. Download the version of PmWiki that you want from http://www.pmichaud.com/pub/pmwiki.

3. Extract the tar image using tar xvfz tgzfile, where tgzfile is the tar file you downloaded above. This will create a pmwiki-x.y.z directory with the new version of the software.

4. Copy the files in pmwiki-x.y.z over the files of your existing PmWiki installation. For example, if your existing PmWiki installation is in a directory called pmwiki, then one way to copy the new files over the existing ones is to enter the command:

        cp -a pmwiki-x.y.z/. pmwiki

Note that Mac OS X and other BSD systems will not not have the -a option as a command-line argument for cp, but that's okay, since it's just shorthand for cp -dpR, so use that instead of -a.

5. That's it! As long as you didn't make any customizations to the pmwiki.php script (LocalCustomizations should go in config.php), then your PmWiki installation should continue to run correctly!

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