Kill port process

refer to: https://stackoverflow.com/questions/24387451/how-can-i-kill-whatever-process-is-using-port-8080-so-that-i-can-vagrant-up/24388281

怎么解决端口被占用的问题？

events.js:292

      throw er; // Unhandled ‘error‘ event

      ^

Error: listen EADDRINUSE: address already in use :::3000