Installing Unity 2D

Open the terminal and type this PPA to get unity 2d working on your desktop with Ubuntu 10.10 or Ubuntu 11.04.

sudo add-apt-repository ppa:unity-2d-team/unity-2d-daily
sudo apt-get update
sudo apt-get install unity-2d

 After the installation, all you need to do is logout/reboot and when you reach ‘Login screen’, select to boot into ‘Unity 2D’ session rather than ‘Ubuntu Desktop’ session which is by-default selection. And thats it. You are now in Unity 2D without losing anything in your Gnome 2.32 desktop or Gnome 3.