How to change Transform Orientation with keyboard in Ubuntu

How I can change Transform Orientation with the keyboard in Ubuntu? In some linux systems (and many others) Alt + Space are a system combination to show application menu and are captured by the OS.

• So is Ctrl Alt Numpad 0 for Align Active Camera to View, which is super handy... I usually disable a bunch of the GNOME keyboard shortcuts. (For example, to minimize, I use [Alt Spacebar] + [N] instead of Ctrl Alt Numpad 0.) – wchargin Nov 7 '13 at 6:04