Check the whois of a domain from the command line.

.zshrc

# Check the whois of a domain or form a URL.
# @usage: whois google.com
# @usage: whois https://google.com
function whois() {
	local domain=$(echo "$1" | awk -F/ '{print $3}') # get domain from URL
	if [ -z $domain ] ; then
		domain=$1
	fi
	echo "Getting whois record for: $domain …"

	# Avoid recursion
					# This is the best whois server AFAIK.
												# Strip extra fluff
	/usr/bin/whois -h whois.internic.net $domain | sed '/NOTICE:/q'
}