egrep

Linux egrep command syntax

Function: egrep command is used to find the specified string in the file.

Syntax: egrep [Template mode] [File or directory]

Linux egrep command example

Display qualified characters in the file. For example, to find files containing the string "Linux" in all files in the current directory, you can use the following command:

egrep Linux *

The results are as follows:

$ egrep Linux * #查找當(dāng)前目錄下包含字符串“Linux”的文件  
testfile:hello Linux! #以下五行為testfile 中包含Linux字符的行  
testfile:Linux is a free Unix-type operating system.  
testfile:This is a Linux testfile!  
testfile:Linux  
testfile:Linux  
testfile1:helLinux! 
#以下兩行為testfile1中含Linux字符的行  
testfile1:This a Linux testfile!  
#以下兩行為testfile_2 中包含Linux字符的行  
testfile_2:Linux is a free unix-type opterating system.  
testfile_2:Linux test  xx00:hello Linux! #xx00包含Linux字符的行  
xx01:Linux is a free Unix-type operating system. #以下三行為xx01包含Linux字符的行  
xx01:This is a Linux testfile!  
xx01:Linux