http://hi.baidu.com/yuhui_bear/blog/item/d087a2642735dffbf736548b.html
http://forum.ubuntu.org.cn/viewtopic.php?f=97&t=248074
http://hi.baidu.com/iceliushuai/blog/item/1e506160c5d01f48eaf8f801.html
足矣!