port is already in use node code example

Example 1: port already in use node js

sudo kill -9 $(sudo lsof -t -i:3000)

Example 2: npm port already in use

$ lsof -i tcp:3000
$ kill -9 PID

Example 3: Port 3000 is already in use, but when I try to kill nothing is found

netstat -ano | findstr :3000
taskkill /PID "123" /F