Error: listen EADDRINUSE: address already in use :::80 code example

Example 1: Error: listen EADDRINUSE: address already in use :::3000

sudo lsof -i :3000

Example 2: EADDRINUSE: address already in use :::5000

sudo lsof -i :3000

Example 3: EADDRINUSE: address already in use

sudo lsof -i :<PORT>
kill -9 <PID>

Example 4: 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}

Example 5: EADDRINUSE: address already in use :::5000

kill -9 {PID}

Example 6: Error: listen EADDRINUSE: address already in use :::3000

ps aux | grep node
kill -9 PID