Linux中几个正则表达式的用法
开源Linux
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· 2020-09-22
开源Linux
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![](https://filescdn.proginn.com/11ca330856efb3518a9bfa7df5233f59/9a18142a6623c95e56a55eb1ce29141b.webp)
正则表达式就是用于匹配每行输入的一种模式,模式是指一串字符序列。拥有强大的字符搜索功能。也非常方便的搜索过滤出我们想要的内容。
![](https://filescdn.proginn.com/a82ca3aa0d772319014bbbc374ea02c2/d8136f04b086dcb2757c8e000428008a.webp)
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cat /etc/passwd |egrep "^(root|A8)" |cut -d: -f1,3
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echo /etc/rc.d/init.d/functions | egrep "[a-z]$"
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echo /etc/rc.d/init.d/functions | egrep "/.*/"
![](https://filescdn.proginn.com/f0cd299a47bed5227ae243585f0aee39/2c27267331568370f8ee5755b89a7b6f.webp)
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