Linux: use the keyboard as a mouse.

TURN ON THE FEATURE

-shift+NumLock

MOVING

-use the 1,2,3,4,6,7,8,9 keys on the number pad

CLICKING

-click by hitting the key 5 in the number pad, for double-click hit it twice

-click-and-hold by hitting 0 key, to release hit 5 in number pad

-by default key 5 in number pad represent the mouse left button, you can modify that with keys "/"(left) "*"(central) and "-"(right) on the number pad

TURN OFF THE FEATURE

-shift+NumLock again