Thursday, January 3, 2013

Finding a File containing a particular text string in Linux server

You need to use grep command. grep searches the given input FILEs for lines containing a match or a text string.

grep command form (syntax)

grep “text string to search” directory-path or ip addtress

Examples

For example search for a string called redeem reward in all text files located in /home/guest/*.txt directory, use
$ grep "192.168.xx.xx" /home/guest/*.txt

Task: Search all subdirectories recursively

You can search for a text string all files under each directory, recursively with -roption:
$ grep -r "192.168.xx.xx" /home/guest

Task: Only print filenames

By default, grep command prints the matching lines You can pass -H option to print the filename for each match.
$ grep -H -r “192.168.xx.xx” /home/guest
Output:
...
filename.txt: 192.168.xx.xx
...
To just print the filename use cut command as follows:
$ grep -H vivek /etc/* -R | cut -d: -f1



Output:

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