killport

killport.js

#! /usr/bin/env node
const util = require("util");
const exec = util.promisify(require("child_process").exec);
const port = process.argv[2];

exec(`lsof -t -i :${port}`)
    .then(result => exec(`kill -9 ${result.stdout}`))
    .then(() => console.log(`Killed process using port ${port}`))
    .catch(e => {
        console.log(`Failed.  Are you sure there was something using port ${port}?`);
    });