If you have Ubuntu 11.04, by now, you have messed around with Unity, the default desktop environment. Maybe, you like it or maybe you don’t. If you’re curious about how Gnome 3 looks like in Ubuntu 11.04, you can install it without much effort. All you need to do is fire up 4 quick commands in your Terminal to get you going.
Install Gnome 3
sudo add-apt-repository ppa:gnome3-team/gnome3 sudo apt-get update sudo apt-get upgrade sudo apt-get install gnome-shell
You need to log out of Unity, choose Gnome when logging back in, for the changes to take effect. By the way, Gnome 3 will break Unity. But, don’t fret. You can restore it easily. Just use the command below to get Unity back in your life.
sudo ppa-purge ppa:gnome3-team/gnome3