How to install classic gnome desktop in ubuntu 12.04 (Precise)

Install classic gnome desktop in ubuntu 12.04
Open the terminal and run one of the following commands both does the same

sudo apt-get install gnome-session-fallback
sudo apt-get install gnome-panel

Once you install the classic gnome desktop you need to logout from the existing session.Once you are at logon screen click the option to change your session then choose Gnome Classic to logon