Brian Parsons

I needed to find an IP address amidst a bunch of random text. I googled and didn't find anything that worked for me the way I needed, so I made my own with awk. I thought I'd put it up here in case someone else could use it:

awk '{match($0,/[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+/); ip = substr($0,RSTART,RLENGTH); print ip}'

So you can pipe anything through this and it will grab the IP (V4) address(es).

Example:

$ ifconfig | awk '{match($0,/[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+/); ip = substr($0,RSTART,RLENGTH); print ip}'