Here's a great Unix keyboard mappings on Xorg for that classic SysV feel in Linux.

Xmodmap

! ~/.Xmodmap
! xmodmap -pke | egrep '(Control|Super|Alt|Menu)'
! Use to set keycodes correctly below. List reordered to match
! keys from left to right.


! First clear all modifiers, caps lock & control
clear lock
clear control
clear mod1
clear mod4

keycode  66 = Alt_L Meta_L
keycode  37 = Super_L
keycode 133 = Alt_L Meta_L
keycode  64 = Control_L
keycode 108 = Control_R
keycode 134 = Alt_R Meta_R
keycode 135 = Alt_R Meta_R
keycode 105 = Super_R

! Let us set some keycodes first, as some programs (vim,tmux,..!) read
! the key names and seem to ignore what's below.
add mod1    = Alt_R Alt_L Meta_R Meta_L
add mod4    = Super_R Super_L Menu
add control = Control_R Control_L

! To load this when done writing
! ~$ xmodmap ~/.Xmodmap