How To Revert Back To Classic Gnome Instead Of Unity In Ubuntu

• Open Ubuntu Software Center.
• Type in "gnome-session-fallback" in the search box, and install.
• Log-out, then click the gear icon on the upper-right of your user name and choose Classic Gnome.
• To hide the panels on top and bottom, just press Alt + right-click, then Properties, and check Auto hide.

That's it!