$ whois -h whois.internic.net help
Whois Server Version 2.0
Domain names in the .com and .net domains can now be registered
with many different competing registrars. Go to http://www.internic.net
for detailed information.
Select a sub-topic for help; '?' (with no RETURN) for a list of options;
RETURN key to return to WHOIS.
WHOIS is used to look up records in the registry database. Whois can provide
information about domains, nameservers, and registrars.