Ubuntu base node.js (and npm) setup

nodejs-install.txt

// first add node.js to the APT package catalog

// node.js Version 5.x
$ curl -sL https://deb.nodesource.com/setup_5.x | sudo -E bash -
// node.js Version 4.x
$ curl -sL https://deb.nodesource.com/setup_4.x | sudo -E bash -

// always a good idea to re-synchronize the whole package index
$ sudo apt-get update

// verify installation
$ node -v
v5.0.0
// or 
$ nodejs -v
v5.0.0

// also npm should be available now
$ npm -v
3.3.6