How to view ports in use
 

I've got a DNS server running on port 53 (as indicated by a successful "telnet mynameserver 53" from a client machine), and I'd like to confirm through the netstat or another command that port 53 is being used, and by the "named" process.

My initial guess was to do a "netstat | grep 53", but that clearly isn't correct. Do you know what command I could use, if any exists, to accomplish this?

Thanks.

Try this: netstat -atu Type: man netstat to get a list of switches.

You can try with This will list all the open ports in your mcahine.

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Prasanta