Originally Posted by Mark_NL
You messed up and the commands you post aren't correct. anyway ..
sudo add-apt-repository ppa:gnome3-team/gnome3
sudo apt-get update
sudo apt-get install gnome-shell
pick GNOME .. unity sucks!
Thanks for your advice.
I have already fixed my problem running;(IIRC)
sudo apt-get install --reinstall ubuntu-desktop