"By default, Ubuntu comes with a set of keyboard shortcut that
you can use straightaway. However, some of these keyboard shortcuts
might not be desirable, troublesome, or obstructive and disrupting
your productivity. For example, if you have a keyboard with a media
button, that button is automatically mapped to Rhythmbox. If your
favorite media player is Banshee, or Exaile, you might want to
change the keyboard shortcut to your favorite application.
"There are several ways to manage your keyboard shortcut in
Linux. You can do it via Xmodmap (and Xkeycaps), Gnome Keyboard
Shortcut or Compiz. In this article, we will focus mainly on Gnome
Keyboard Shortcut and Compiz. Gnome Keyboard Shortcut
"The Gnome keyboard shortcut is by far the easiest way to
assign/remap a shortcut key in any Gnome-based distro. Go to System
-> Preferences -> Keyboard Shortcuts."