[Ubuntu 12.04 LTS] Remove Unity (Weight reduction of Ubuntu)

sudo apt-get install gdm gnome-shell synaptic deborphan

select "gdm"

Reboot the system to log and choose "Gnome"

removal of Unity in all its components:

sudo apt-get remove unity unity-2d unity-2d-common unity-2d-panel unity-2d-shell unity-2d-spread unity-asset-pool unity-common unity-lens-applications unity-lens-files unity-lens-music unity-lens-video unity-scope-musicstores unity-scope-video-remote unity-services indicator-messages indicator-status-provider-mc5 appmenu-qt appmenu-gtk appmenu-gtk3 lightdm unity-greeter overlay-scrollbar zeitgeist zeitgeist-core zeitgeist-datahub activity-log-manager-common activity-log-manager-control-center sudo apt-get autoremove sudo apt-get purge `deborphan` sudo apt-get purge `deborphan` sudo apt-get purge `deborphan` sudo dpkg --purge `dpkg -l | egrep "^rc" | cut -d' ' -f3`

Source : https://plus.google.com/+JosephAffonsoXaxo/posts/H6wkF9CF7Dr#+JosephAffonsoXaxo/posts/H6wkF9CF7Dr