grep the contents of a file with another file

bluethundr · 09-25-2010, 05:59 PM

someone once told me that use can pass a file to grep and use that to search the contents of another file.

if that is the case I'm not entirely sure why the following isn't working for me.

Code:

[root@LCENT01:~]#grep -i id_rsa.pub .ssh/authorized_keys 
[root@LCENT01:~]#cat id_rsa.pub >> .ssh/authorized_keys 
[root@LCENT01:~]#grep -i id_rsa.pub .ssh/authorized_keys

thanks in advance!

fuubar2003 · 09-25-2010, 06:04 PM

Code:

grep -f <filename> <filenameyouaresearching>

...is that what yer lookin for?

From 'grep --help':

-f, --file=FILE obtain PATTERN from FILE

bluethundr · 09-26-2010, 12:24 AM

Quote:

Originally Posted by fuubar2003

Code:

grep -f <filename> <filenameyouaresearching>

...is that what yer lookin for?

From 'grep --help':

-f, --file=FILE obtain PATTERN from FILE

Yep that did it!!! thanks!!

grail · 09-26-2010, 01:24 AM

Please mark as SOLVED when you have a solution.