April 17, 2013, 11:48 AM — Here's how you can install the GNOME Classic desktop in Ubuntu 13.04.
1. Open a terminal window.
2. Type in the following command then hit Enter.
sudo apt-get install gnome-session-fallback
For more, see the original article at the link below.
How to Install Gnome Classic on Ubuntu 13.04 / 12.10 / 12.04 | Linux Geekster