Error: listen EADDRINUSE: address already in use :::9000 node 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 :::8080

ps aux | grep node //gets all the nodes and list of PID
kill -9 {PID}