Ubuntu shell utility to check if the modifier key is pressed down

Question

Is there any shell utility in Ubuntu which can define if the modifier key (Ctrl, Shift, Super, Alt) is pressed down on the moment when i run it?

Answer 1

There is the xev utility which prints information about X events (including keypress events). It's available if you're running X11.

Answer 2

Use showkey. Manpage is here.