Question

I have all the IPs that I want to dig +trace -x in a file called ‘ips’.

I want to only see the ns1 (and/or) ns2 records of the IP and and have the IP and the ns1 or ns2 record output on the same line, like so:

1 - $IP - $NS
2 - $IP - $NS
etc.

Right now, I only have a script I call ‘digdug’, which looks like this…

for i in `cat ips`
do
dig +trace -x $i | tail -n7
done

and then I am able to see the IP that it is digging by running: bash -x digdug

But, what I really need is the IP and the ns record on one line, then the next IP in the list with ns record on the next line. Then the next and so on.

Any help is greatly appreciated!

Answer 1

Perhaps something like this?

for ip in `cat ips`; do
  ns=`dig +trace -x $ip | tail -n7 | awk '/NS/ {print $NF}'`
  echo "$ip - $ns" | tr '\n' ' '
  echo ""
done