If you’ve migrated to Ubuntu 11.10, and you’re having a hard time getting used to “Unity,” there’s hope!.. Well, sort of. You can install Gnome Classic, which will make the interface a bit more familiar, but still is gnome3, and it is a huge transformation from previous versions of gnome, but at least is not Unity. Gnome Classic is not installed by default so you’ll have to install it. And this is ubuntu with gnome classic installed.
1- Open terminal window and type
sudo apt-get install gnome-session-fallback