keycode 52 = z Z Tab Tab Tab keycode 20 = minus braceleft underscore underscore underscore keycode 21 = plus braceright equal equal equal keycode 58 = m M bracketleft bracketleft bracketleft keycode 47 = semicolon colon bracketright bracketright bracketright keycode 60 = period greater bar bar bar keycode 104 = Return Escape
xmodmap /path/to/your/.xmodmap