http://www.cnblogs.com/ylqmf/archive/2012/11/05/2754795.html
http://wuquan-1230.blog.163.com/blog/static/298111532011112851419497/
http://www.linuxidc.com/Linux/2013-09/90092.htm
http://www.cnblogs.com/GoodGoodWorkDayDayUp/p/3473348.html
http://www.tuicool.com/articles/Ezie22
原文：http://www.cnblogs.com/zengkefu/p/4993937.html
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