End the process that's using a specific port.

kill-port

#! /usr/bin/env bash

function kill-port () {
    local length=$(($#-1))
    local killargs=( "${@:1:$length}" )

    shift $(($# - 1))
    local port=$1
    local pid
    pid=$(lsof -t -i :"$port")

    if [ "$pid" = "" ]; then
        echo "Port $port isn't being used."
        exit 0;
    fi

    kill "${killargs[@]}" "$pid"
    echo "PID $pid, matching port $port was terminated."
}

kill-port "$@"

Nice. I didn't know about shellcheck. Found kill-port -s KILL 1234 wasn't working, but it is now. Thanks!