Find (and kill) process locking port 3000 on Mac [closed]

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  1. You can try netstat

     netstat -vanp tcp | grep 3000

  2. For macOS El Capitan and newer (or if your netstat doesn’t support -p), use lsof

     lsof -i tcp:3000

  3. For Centos 7 use:

     netstat -vanp --tcp | grep 3000

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