環境:CentOS 6.3
1. grep 選項
文件內容:
$ cat mytxt
sfsg sfjhsiof1232
fsdf23432
i love china
i love china -verz
123421b
CHINA
chIna
匹配行的條數:-c
$grep -c "china" mytxt
2
不區分大小寫:-i
$ grep -i "chinA" mytxt
i love china
i love china -verz
CHINA
chIna
顯示匹配行的行號:-n
$ grep -n -i "chinA" mytxt
3:i love china
4:i love china -verz
6:CHINA
7:chIna
查詢多文件時不顯示文件名:-h
grep -n -i "chinA" *
mytxt:3:i love china
mytxt:4:i love china -verz
mytxt:6:CHINA
mytxt:7:chIna
====>
$ grep -n -i -h "chinA" *
3:i love china
4:i love china -verz
6:CHINA
7:chIna
只顯示匹配的文件名:-l
$ grep -n -i -l "chinA" *
mytxt
顯示不匹配的行:-v
$ grep -v "china" mytxt
sfsg sfjhsiof1232
fsdf23432
123421b
CHINA
chIna
精確匹配:\>
$ grep "i" mytxt
sfsg sfjhsiof1232
i love china
i love china -verz
=====>
grep "i\>" mytxt
i love china
i love china -verz
2. 用例
查看目錄下所有非目錄文件
ls -l | grep "^[^d]"
查看大寫字母開頭的文件
ls | grep "^[A-Z]"
查看非大寫字母開頭的文件
ls | grep "^[^A-Z]"