On macOS use the command lsof -i with the port number to find out what is running on a specific port.
sudo lsof -i :<portnumber>> This will work for linux as well ;)
Kill the process running on a specific port
use the kill command with the -9 option and the port PID number to kill a process
kill -9 <pid>
Software engineer III at Oracle. I build high-performance web applications and write about the intersection of software engineering and human creativity.
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