adding a line if pattern found

abhigrkist · 11-27-2009, 02:11 AM

Hi Guys,
need your help.
i am finding a pattern in file.if that pattern found then I have to add a line after that matching pattern containing some worrds(say match found)through shell script or commmands

rikijpn · 11-27-2009, 02:55 AM

It's very simple. You just test on an "if" line whether the pattern was found or not, then you do echo or printf to print a message. Something like

Code:

if [ `grep someword somefile|wc -l` -gt 0 ] ; then echo "pattern found"; else echo "pattern not found"; fi

If you have to put it like right in the file, just use sed and replace the string by itself plus some line.

abhigrkist · 11-27-2009, 03:05 AM

thanks riki ...

abhigrkist · 11-27-2009, 03:07 AM

Riki I have to add a comment after the NEXT LINE OF paTTERN IN FILE .....PLZ HELP

centosboy · 11-27-2009, 03:10 AM

Quote:

Originally Posted by abhigrkist

Riki I have to add a comment after the NEXT LINE OF paTTERN IN FILE .....PLZ HELP

try

Code:

sed -i '/pattern/ a found' file

use first without -i for testing

abhigrkist · 11-27-2009, 05:06 AM

thanks dude

centosboy · 11-27-2009, 06:46 AM

Quote:

Originally Posted by abhigrkist

thanks dude

did it work??

abhigrkist · 11-30-2009, 02:22 AM

yaa its working thanks