将下面的代码放入～/.Xmodmap中中，
remove Lock = Caps_Lock remove Control = Control_L keysym Control_L = Caps_Lock keysym Caps_Lock = Control_L add Lock = Caps_Lock add Control = Control_L
注意大小写
ubuntu修改ctrl与capslock键位
原文：http://www.cnblogs.com/vactor/p/5026268.html
