Get IP from FQDN

From TomSchaefer.org Wiki

Use Host command Example: # host www.google.com google has addr 208.69.36.230 google has addr 208.69.36.231

 #Find IPs.sh
 #!/bin/bash
 for hostname in $(cat servers.txt);do
 host $hostname |grep "has address"
 done

Find IPs.sh > file |sort -u

or only IP addresses change line 4:

 host $hostname |grep "has address" | cut -d " " -f4