check-domain-availability.sh

#!/bin/sh
# Based off of https://superuser.com/questions/433316/check-a-list-of-domains-with-the-whois-command
while read domain; do
	printf '%s ' "$domain" # This way we know what whois is currently looking up before it completes.
	whois "$domain" | grep -qci 'No Match'
	if [ $? -ne 0 ]; then echo "REGISTERED"; else echo "AVAILABLE"; fi
done