NodeJS + MongoDB + ExpressJS

ubuntu 14.04 LTS

nodejs install

apt-get update
apt-get upgrade
apt-get install nodejs npm nodejs-legacy

mongodb install

apt-key adv –keyserver  hkp://keyserver.ubuntu.com:80 –recv 7F0CEB10
echo ‘deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen’| sudo tee /etc/apt/source.list.d/mongodb.list 
apt-get update
apt-get install mongodb-org

mkdir app-folder
cd app-folder
nano package.json

{
  "name": "hello-world",
  "description": "hello world test app",
  "version": "0.0.1",
  "private": true,
  "dependencies": {
    "express": "3.x"
  }
}

and npm install