Gnome Classic in Ubuntu 12.04 (Precise Pangolin)

   To get started, press Ctrl – Alt – T on your keyboard to open Terminal.
When it opens, run the commands below to enable Gnome Classic.

sudo apt-get install gnome-session-fallback 

Restart and on the logon screen, click the option to change your session.

Then choose Gnome Classic to logon.

http://www.liberiangeek.net/2012/03/return-to-gnome-classic-in-ubuntu-12-04-precise-pangolin/

Install Classic Menu Indicator in Ubuntu 12.04 (Precise Pangolin)

http://www.liberiangeek.net/2012/05/install-classic-menu-indicator-in-ubuntu-12-04-precise-pangolin/

Are you finding it hard to browse and find what you’re looking for in Ubuntu?

Want to go back to gnome classic menu instead?
Well, you can have both;
Ubuntu Unity Desktop as well as Ubuntu Classic Menu.

sudo apt-add-repository ppa:diesch/testing

sudo apt-get update && sudo apt-get install classicmenu-indicator

Enable Classic GNOME In Ubuntu 13.04

http://www.liberiangeek.net/2013/04/no-unity-here-enable-classic-gnome-in-ubuntu-13-04/

On the logon screen, select the Ubuntu logo ;
Next, choose ‘GNOME Fallback’