Nginx startup failed, port 80 is occupied, kill process cannot be dropped 🫨

  • Nginx startup failed, prompt that port 80 is occupied
nginx: [emerg] bind() to 0.0.0.0:8080 failed (48: Address already in use) 
nginx: [emerg] bind() to 0.0.0.0:8080 failed (48: Address already in use) 
nginx: [emerg] bind() to 0.0.0.0:8080 failed (48: Address already in use) 
nginx: [emerg] bind() to 0.0.0.0:8080 failed (48: Address already in use) 
nginx: [emerg] bind() to 0.0.0.0:8080 failed (48: Address already in use) 
nginx: [emerg] still could not bind()

I tried multiple methods, including finding a process, killing a process, and using the network monitor to find a process, but none of them were successful.

  • Final solution
lsof -iTCP -sTCP:LISTEN -P | grep :80

Find which process is listening on port 80

If there is no lsof, install lsof first

brew install lsof
  • Finally, kill the process
sudo kill  PID

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