To remvie Caps Lock in Linux and replace it with escape:
Add the following line to your init script:

xmodmap .removecaps

and create the file .removecaps with:

::::::::::::::
.removecaps
::::::::::::::
remove Lock = Caps_Lock
keysym Caps_Lock = Escape
add Lock = Caps_Lock

And that is it, you are Caps Lock free. That trick is for X, for console
use loadkeys, just do a man loadkeys and use it.