netstat
Displays network-related information such as open connections, open socket ports, etc. More information: https://man7.org/linux/man-pages/man8/netstat.8.html.
- 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
