http://blog.leanote.com/post/rexlevin/ubuntu14%E4%B8%8Batom%E4%B8%AD%E6%96%87%E4%B9%B1%E7%A0%81%E6%96%B9%E5%9D%97(https://www.oschina.net/action/GoToLink?urlhttp%3A%2F%2Fblog.le