 grep
Suppose you have recorded some infomation in
a file but you forget what is the name of the file and where
you have placed the file. This command will look at the contents
of files to find the information you want.
example:
Suppose your present working directory is /home/joe
, and you want to look for the string "informa"
in all files inside /home/joe , incliuding all subfolders.
[joe@server /joe]$ grep -r infoma *
This command tells the computer to look the string
"informa" in all files inside /home/joe , including
the files inside all subfolders. (The "-r" specifies
subdirectories should be searched. The "*" specifies
that all files are searched.)
Possible output:
password.txt: This file contains sensitive information.
htdocs/contact.html: Further information can be found at
htdocs/support/more.html: research purposes, informative material
can be found
In this case, there are 3 instances where
the string "informa" appears.
One is at /home/joe/password.txt ,
another at /home/joe/htdocs/contact.html ,
and one more at /home/joe/htdocs/support/more.html |
