about Standard Internet Services

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i know some Standard Internet Services in UNIX, for example:

Name    TCP port   UDP port     RFC                     Description
echo     7          7           862               Server returns whatever the client sends.

if i use ubuntu, how can i know about this Server? how to turn on and use.
thank you for your answer.

Posted 22-Jan-11 16:38pm

lxlenovostar

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Andrew Brock · Accepted Answer · 2011-01-22T20:39:00

If the port is open on your computer and you want to see what is using it, you can use netstat -b from the command line.

See Netstat[^] options on Wikipedia.

If the service is not running and you want to know what might use that port, then see the List of ports[^] on Wikipedia

If you want to find what protocol is running on a port on a remote computer, use something like nmap[^]

Dave Kreskowiak · Accepted Answer · 2011-01-22T18:18:00

If you're talking about turning the machine on, you can't unless you've got physical access or Wake On LAN support is enabled and you've got the authority to do it.

If you're talking about starting the server that is supposed to be listening to that port, then you have to have authority to start it up, either at the console, or over a remote console.

If you're talking about the Echo server, all it does it return to you everything that is sent to it. If you're looking for more information than that, Google for "Echo Server".

about Standard Internet Services

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