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Linux tutorial: Find out which process is listening upon a port - YouTube
How to check open ports in Linux using the CLI - nixCraft
Test if a port on a remote system is reachable
4 Ways to Find Out What Ports Are Listening in Linux
Test if a port on a remote system is reachable
How to Check for Open Ports in Linux | Linux | Maker Pro
How to check open ports in Linux using the CLI - nixCraft
