Sending keyboard input to a program from command-line

Question

How do you send keyboard input to a program?

That is, under a Linux GUI, is there a good manual (programmable) way, or tool, of simulating keyboard input on a running pr

Answer 1

xdotool does have a way of sending keystrokes if limited to a focused window:

WID=`xdotool search "Mozilla Firefox" | head -1`
xdotool windowactivate $WID
xdotool key ctrl+l