kill process on port without sudo code example

Example 1: ubuntu stop process on port

sudo kill -9 `sudo lsof -t -i:{PORT_NUMBER}`

Example 2: kill a port in ubuntu

kill -9 $(sudo lsof -t -i:'portName')
//Ex. if portname is 3000
//then we will execute "kill -9 $(sudo lsof -t -i:3000)"