Update: The ppa hasn’t been updated in over a year so, just go to phpmyadmin.net, download the .deb and overwrite the installed packages and maybe do a reconfig.
If you installed phpMyAdmin from the main repositories, chances are you’re never going to be up to date with the latest stable release. Ubuntu users got it easy though, while in Windows you would download the zip file containing the latest stable release, dump it in your wamp/apps folder and change the .conf file every time a new version comes out, in Ubuntu you only need to add a ppa repository and let apt handle the rest.
To add the repository
sudo add-apt-repository ppa:tuxpoldo/phpmyadmin
To install the latest version
sudo apt-get update sudo apt-get install phpmyadmin
The installation process is pretty straight-forward to the point where it asks you reconfigure the db (attempting to do that didn’t work in my case so you probably might as well abort that from the start).
Also it might be possible that you get left with a bunch of orphaned packages which you can get rid of by running a simple
sudo apt-get autoremove or something.
To remove the repository
If you want to keep only the packages you installed from the ppa:
sudo add-apt-repository --remove ppa:tuxpoldo/phpmyadmin
If you want to remove everything (i.e. the repository and the installed packages):
sudo apt-get install ppa-purge; sudo ppa-purge ppa:tuxpoldo/phpmyadmin
That’s about it. Now in case you haven’t done this already, you need to check out my dark minimal theme for phpMyAdmin, always updated and optimized for the latest stable release. Clone the repository in your themes directory and go feel good about yourself.