Linux 之 正則表達式實例
阿新 • • 發佈：2018-05-08
正則表達式正則表達式實例
文件內容： I am oldboy teacher! I teach linux. Ilike badminto ball http:/www.baidu.com my qq num is 412421412 I am oldboy teacher! I teach linux. I like badminton ball,billiard ball and chinese chess! my blog is http://oldboy.blog.51cto.com our site is http://www.etiantian.org my qq num is 444877 not 44453434 my god,i am not oldbey,but OLDBOY! 1.基礎正則第一學 ^word 匹配以word開頭的內容。 word$ 匹配word結尾的內容。 ^$ 表示空行 示例： [root@localhost kang]# grep "^m" test.txt #以m開頭 my blog is http://oldboy.blog.51cto.com my qq num is 444877 my god,i am not oldbey,but OLDBOY! [root@localhost kang]# grep "m$" test.txt #以m結尾 my blog is http://oldboy.blog.51cto.com [root@localhost kang]# grep "^$" test.txt #輸出空行 [root@localhost kang]# grep -v "^$" test.txt #排除空行
Linux 之 正則表達式實例