How to set Caps Lock to write a character?

Question

Is it possible to change Caps Lock to a special character like $ (most use in PHP) ?

Answer 1

I solved it by xmodmap:

1- I find Caps Lock key value by xev, my CapsLock key has 66 of keycode.

2- Assign $ on the Caps Lock:

$ xmodmap -e "keycode 66 = dollar"

List of Keysyms Recognised by Xmodmap