Summary
xmodmap is a utility for modifying keymaps(keyboard keys) and pointer button mappings in XOrg . details
Configurations
Change Caps lock to contorl
ref ~/.xmodmap
!capslock map to control
keycode 66 = Control_L
clear Lock
add Control = Control_L
keycode 117 = Caps_Lock
add Lock = Caps_Lock
! to set "setxkbmap -option"
! swap Caps_Lock and Control_R
!
remove Lock = Caps_Lock
remove Control = Control_R
keysym Control_R = Caps_Lock
keysym Caps_Lock = Control_R
add Lock = Caps_Lock
add Control = Control_R
then to apply this settings
Appying modfied
xmodmap ~/.xmodmap
Resetting the applied modifications
setxkbmap -option