Ubuntu – How to install KDE along Unity

You need to install the kubuntu-desktop package for the full install.

The GUI method would be to click this button:

_{(source: hostmar.co)}

The command line method would be:

sudo apt-get install kubuntu-desktop

Then the next time you login you can choose what to use from the login screen (under Session).

I think that if you want to experiment with different Desktop Environments it is perhaps best to do that on virtual machines rather than the computer you use all the time.

Each DE installs so many other programs you're bound to get some clashes, and certainly lots of alternative apps you probably don't want (how many office apps do you need?)