How to output a string by using wildcards?

fish-master · 02-21-2010, 02:15 PM

I'm trying to make a shell script, and for part of it I need to search through a file, find the ip in the file, and save ONLY the ip to another file. ( not the entire line that its on )
I understand grep has wildcards, where I could do something like,
"grep (...........) traceroute-output
for an ip address.

Any ideas? Thanks.

micxz · 02-21-2010, 02:58 PM

grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}'

does this help'

Tinkster · 02-21-2010, 02:59 PM

man grep
/-o

Cheers,
Tink

fish-master · 02-21-2010, 03:03 PM

great. Thanks for the quick help.