What is the command ..

Hi All,

What is the commnad in linux to see all the ports that are used.
I mean there is a commnad that i forget, that scans all the ports running on the system.

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netstat -a

> scans all the ports running on the system
It should be "nmap", which is network port scanner.


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nmap is much more than a port scanner!!
Use carefully!!
nmap allows all kinds of incomplete TCP connects,  etc etc
btw, port-scanning is a pretty security-sensitive issue, so be sure you are not unduly doing something which your sysadmin might not want. Exceptions to this case are when you urself are the sysadmin ;)

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