Simple script to check in DNS if a domain belongs to my server.

gistfile1.sh

#!/bin/bash

### DNS server to check in whois result
server="ns1.mydomain.com"
### If will get by ls in folder
zones="/var/cache/bind/"
### One per line
zone_list="/var/cache/bind/domains.txt"

### Comment to use ls based
for domain in `cat $zone_list`
### Uncomment to use file list
#for domain in `ls $zones`
 do
  echo -n "Check whois info for $domain..."

  if [ `whois $domain |grep -c -i $server` -gt 0 ]
  then
    echo ' OK'
  else
    echo ' Error';
  fi
  sleep 30
done