Netstat show udp listening ports

1. Does netstat show UDP ports?
2. How do I check if a UDP port is listening?
3. How can I see what UDP ports are open?

Does netstat show UDP ports?

netstat displays incoming and outgoing network connections (TCP and UDP), host computer routing table information, and interface statistics.

How do I check if a UDP port is listening?

Check Listening Ports with netstat

-u - Show UDP ports. -n - Show numerical addresses instead of resolving hosts. -l - Show only listening ports. -p - Show the PID and name of the listener's process.

How can I see what UDP ports are open?

Use ss command to display all open TCP and UDP ports in Linux. Another option is to use the netstat command to list all ports in Linux. Apart from ss / netstat one can use the lsof command to list open files and ports on Linux based system. Finally, one can use nmap command to check TCP and UDP ports too.