grep DEMO

测试数据:

[xiluhua@vm-xiluhua][~]$ cat msn.txt
aaa bbb
bbb ccc
ccc ddd
bbb eee
aaa ccc
bbb sss

[xiluhua@vm-xiluhua][~]$ cat msn.bk 
AAA BBB
BBB CCC
CCC DDD
BBB EEE
AAA CCC
BBB SSS

[xiluhua@vm-xiluhua][~]$ cat msn3.bk 
AAA BBB
BBB CCC
CCC DDD
BBB EEE
AAA CCC
BBB SSS

 

-i选项,不分大小写;-r选项,递归匹配;递归匹配当前目录下的包含"AAA BBB"的文件:

[xiluhua@vm-xiluhua][~]$ grep -nri "AAA BBB" .
./msn.txt:1:aaa bbb
./msn3.bk:1:AAA BBB
./msn.bk:1:AAA BBB
./bk/msn.bk:1:AAA BBB

 

-l选项,递归匹配当前目录下包含"AAA BBB"的文件的文件名:

[xiluhua@vm-xiluhua][~]$ grep -rl "AAA BBB" .
./msn3.bk
./msn.bk
./bk/msn.bk

 

-n选项,显示行号,查找文件/etc/passwd中帐号xiluhua的信息:

[xiluhua@vm-xiluhua][~]$ grep -n "xiluhua" /etc/passwd
52:xiluhua:x:1000:1000:xiluhua:/home/xiluhua:/bin/bash

 

-c选项,报告文件中模式被匹配到的次数:

[xiluhua@vm-xiluhua][~]$ grep -c "aaa" msn.txt 
2

 

-e选型,或(or)的方式匹配多个字串  

例如:grep –nE 'god|good' msn.txt
匹配god或者good。

[xiluhua@vm-xiluhua][~]$  ps -aux | grep -E 'USER|mem' | grep -v 'grep'
USER        PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
xiluhua   10375  0.0  0.0 317024     0 ?        Ssl  9月07   0:20 memcached -d -p 11211 -m 128

 

^字符,匹配以字符开头的行:

root@MiWiFi-R3-srv ~ $ grep '^k' anaconda-ks.cfg 
keyboard --vckeymap=us --xlayouts='us'
kexec-tools

 

字符$,匹配以字符结尾的行:

root@MiWiFi-R3-srv ~ $ grep 'tools$' anaconda-ks.cfg 
kexec-tools

 

posted @ 2016-07-16 14:48  xiluhua  阅读(295)  评论(0编辑  收藏  举报