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Display network-related information such as open connections, open socket ports, etc. More information:

  • List all ports:

netstat --all

  • List all listening ports:

netstat --listening

  • List listening TCP ports:

netstat --tcp

  • Display PID and program names:

netstat --program

  • List information continuously:

netstat --continuous

  • List routes and do not resolve IP addresses to hostnames:

netstat --route --numeric

  • List listening TCP and UDP ports (+ user and process if you're root):

netstat --listening --program --numeric --tcp --udp --extend