xmodmap(1) on Linux
The text 922adb8371f2, as Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it.
utility for modifying keymaps and pointer button mappings in X
Flags it lists
-
-display -
-e -
-grammar -
-help -
-n -
-pk -
-pke -
-pm -
-pp -
-quiet -
-verbose -
-version