If you are using desktop cube, then simply open CompizConfig settings manager, from there click on "Rotate Cube", then click on the "Bindings" tab, then on "Rotate cube", then you change the keyboard shortcut in right of "Rotate left" and "Rotate right".
If you dont find CompizConfig in menus, you can open terminal or the "Run" dialogue and type in "ccsm"
If that does not start the program, then do
Code:
su -
yum install ccsm