Unix/Linux/Mac OS: release/free TCP/IP port

  • check which process is listening to (using) the port:
    fuser 8080/tcp
    It will returns the pid of the process, like below:
    8081/tcp:             7391
    , you can then use the process id to find which application is using the port:
    ps aux | grep 7391
  • to kill the process that is using the port, you can simply do:
    sudo fuser -k 8080/tcp

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