I found the following on a Ubuntu mailing list and tried it on the Ubuntu desktop (now upgraded to 7.10 Gutsy). I thought it would be nice to become familiar with KDE as well as Gnome – so it’s got to be worth a try – right?
1. Open a Terminal
sudo apt-get install kubuntu-desktop
3. Wait until all of the packages have been downloaded and installed. Half-way through the install process it asked me if I wanted to use KDE as a default (which I don’t), so that was easy to answer. Once finished…
4. Log out and then select KDE session from the Options menu before logging back in. There you go – KDE! Neat, huh?