http://www.cnblogs.com/chengmo/archive/2010/10/10/1847287.html linux shell 正则表达式(BREs,EREs,PREs)差异比较
http://www.360doc.com/content/11/0304/11/5912935_98007617.shtml 正则表达式练习
http://www.jb51.net/article/42989.htm Linux 正则表达式详解
http://www.sjhf.net/blog/user1/sjhf/archives/2006/2006413152324.htm 正则表达式教程，详细描述正则表达式的用法
http://blog.csdn.net/wklken/article/details/6429526
原文地址：http://blog.csdn.net/u013018721/article/details/41444367
