linux中grep命令锚定锚定单词的词首、词尾

1、测试数据

[root@centos79 test]# cat a.txt
a g e
u c j alike
i x k like
w f g liker
s g e g
[root@centos79 test]# grep like a.txt
u c j alike
i x k like
w f g liker

 

2、\b、\B锚定单词的词首

[root@centos79 test]# cat a.txt
a g e
u c j alike
i x k like
w f g liker
s g e g
[root@centos79 test]# grep "like" a.txt
u c j alike
i x k like
w f g liker
[root@centos79 test]# grep "\blike" a.txt
i x k like
w f g liker
[root@centos79 test]# grep "\Blike" a.txt
u c j alike

 

3、\b、\B锚定词尾

[root@centos79 test]# cat a.txt
a g e
u c j alike
i x k like
w f g liker
s g e g
[root@centos79 test]# grep "like" a.txt
u c j alike
i x k like
w f g liker
[root@centos79 test]# grep "like\b" a.txt
u c j alike
i x k like
[root@centos79 test]# grep "like\B" a.txt
w f g liker

 

4、同时锚定词首和词尾

[root@centos79 test]# cat a.txt
a g e
u c j alike
i x k like
w f g liker
s g e g
[root@centos79 test]# grep "like" a.txt
u c j alike
i x k like
w f g liker
[root@centos79 test]# grep "\blike\b" a.txt
i x k like
[root@centos79 test]# grep -w "like" a.txt
i x k like

 

5、

[root@centos79 test]# cat a.txt
a g e
u c j alike
i x k like
w f g liker
s g e g
[root@centos79 test]# grep "\<like" a.txt
i x k like
w f g liker
[root@centos79 test]# grep "like\>" a.txt
u c j alike
i x k like
[root@centos79 test]# grep "\<like\>" a.txt
i x k like

 

 

参考：https://www.cnblogs.com/flyor/p/6411140.html