close every port connection code example
Example 1: kill port ubuntu
sudo kill -9 `sudo lsof -t -i:9001`
Example 2: stop port ubintu
sudo kill -9 `sudo lsof -t -i:9001`
sudo kill -9 `sudo lsof -t -i:9001`
sudo kill -9 `sudo lsof -t -i:9001`