$ npm install
$ node greeting.js
$ node greeting_exports_main.js
$ node hello_someone.js -> http://localhost:8080/
$ node hello_action.js -> http://localhost:8081/
$ node --debug-brk debug.js
$ node_modules/.bin/node-inspector -> http://localhost:8080/debug?port=5858
$ mkdir mongo $ mongod --dbpath ./mongo $ mongo sampledb