xev
ggkch@Sam666:~> whereis xmodmap
xmodmap: /usr/X11R6/bin/xmodmap /usr/bin/X11/xmodmap /usr/X11/bin/xmodmap
ggkch@Sam666:~> xmodmap
xmodmap: up to 4 keys per modifier, (keycodes in parentheses):
shift Shift_L (0x32), Shift_R (0x3e)
lock Caps_Lock (0x42)
control Control_L (0x25), Control_R (0x6d)
mod1 Alt_L (0x40), Alt_L (0x7d), Meta_L (0x9c)
mod2 Num_Lock (0x4d)
mod3
mod4 Super_L (0x73), at (0x74), Super_L (0x7f), Hyper_L (0x80)
mod5 Mode_switch (0x5d), ISO_Level3_Shift (0x71), ISO_Level3_Shift (0x7c)
;; joystick number (-1 means no joystick):
(joystick 0)
(joystick-x 0)
(joystick-y 1)
(joystick-a 3)
(joystick-b 2)
(joystick-start 0)
(joystick-deadzone 4096)