PmWiki is designed to make it easy to upgrade the Pm Wiki software without affecting your existing data files or installation. For most upgrades, you simply copy the files in the new release over your existing installation.

Note for Pm Wiki 1.0 sites: Upgrading from 1.0.x to 2.0 requires more than simply copying the 2.0 software over the 1.0 installation. See Upgrading From PmWiki 1 for more details.

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. Upgrading from a beta version of 2.0 is quite easy, but taking a look at the 2.0 PmWiki:ReleaseNotes doesn't hurt.

1. It's always a good idea to have a backup copy of your existing Pm Wiki 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 Pm Wiki 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 Pm Wiki installation. For example, if your existing Pm Wiki 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.

On (some) FreeBSD servers you have to use

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


5. That's it! As long as you didn't make any customizations to the pmwiki.php script or to the files in scripts/, your Pm Wiki installation should continue to run correctly! (Local customizations should go in local/config.php)