1. http://www.cnblogs.com/Greenwood/archive/2011/02/27/1966472.html
2.http://www.linuxidc.com/Linux/2011-07/39301.htm
3.http://www.2cto.com/kf/201201/117906.html
4.http://blog.sina.com.cn/s/blog_5688414b0100wgt7.html
5.http://my.unix-center.net/~Simon_fu/?p=652