free all ports ubuntu code example
Example 1: kill port ubuntu
sudo kill -9 `sudo lsof -t -i:3002`
Example 2: how to stop running port in ubuntu
sudo kill -9 `sudo lsof -t -i:{PORT_NUMBER}`
sudo kill -9 `sudo lsof -t -i:3002`
sudo kill -9 `sudo lsof -t -i:{PORT_NUMBER}`