Error: listen EADDRINUSE: address already in use :::3001 pm2 start code example
Example 1: Error: listen EADDRINUSE: address already in use :::3000
sudo lsof -i :3000
Example 2: Error: listen EADDRINUSE: address already in use :::9000
step-1 Enter commond to see running ports & processes
ps -ef
step-2 To stop port and processes
sudo kill {PID}