whois

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[roberto@hdom01 perl]$ whois
Usage: whois [OPTION...] query[@server[:port]]
valid options:
       -h server  server name
       -p port    server port
       -t timeout query time limit
       -r         force recursion
       -n         disable recursion
       -v         verbose mode
       --         treat remaining arguments as part of the query
default server is whois.crsnic.net
[roberto@hdom01 perl]$ whois /h
[whois.crsnic.net]

Whois Server Version 1.3

Domain names in the .com, .net, and .org domains can now be registered
with many different competing registrars. Go to http://www.internic.net
for detailed information.

No match for "/H".

>>> Last update of whois database: Thu, 18 Jul 2002 16:56:04 EDT <<<

The Registry database contains ONLY .COM, .NET, .ORG, .EDU domains and
Registrars.


[roberto@hdom01 perl]$ whois -h
whois: option requires an argument -- h
Usage: whois [OPTION...] query[@server[:port]]
valid options:
       -h server  server name
       -p port    server port
       -t timeout query time limit
       -r         force recursion
       -n         disable recursion
       -v         verbose mode
       --         treat remaining arguments as part of the query
default server is whois.crsnic.net
[roberto@hdom01 perl]$


[roberto@hdom01 perl]$ ping
Usage: ping [-LRUbdfnqrvVaA] [-c count] [-i interval] [-w deadline]
            [-p pattern] [-s packetsize] [-t ttl] [-I interface or address]
            [-M mtu discovery hint] [-S sndbuf]
            [ -T timestamp option ] [ -Q tos ] [hop1 ...] destination
[roberto@hdom01 perl]$