Question

I am trying to process IP addresses from traceroute,which writes to a file called td on disk,after which I do a

grep -o '[0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]*[0-9]*[0-9]' td | uniq

to get the list of unique IP addresses. Next i can get the geolocation data for the address by

lynx -dump http://api.hostip.info/get_html.php?ip=8.8.8.8

But now how do I feed the multiple outputs of the first into the second without needing to write to another file on the disk.

As an aside I was wondering if i could remove the file td completely and pipe traceroute output directly to grep somehow.

Answer 1

Can you use a shell for loop?

for i in $(cat td)
do
  lynx -dump http:/...${i}
done

You can replace $(cat td) with $(traceroute <options> | grep -o '[0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]*[0-9]*[0-9]' | uniq) to avoid the intermediate file td.