Lesson 0 (Install nodejs and npm)
Install nodejs on ubuntu (debian)
I use ubuntu as my OS and I the following method to install NodeJS and NPM in the latest versions
$ sudo apt-get update
$ sudo apt-get install python-software-properties
$ sudo add-apt-repository ppa:chris-lea/node.js
$ sudo apt-get update
$ sudo apt-get install nodejs
$ sudo apt-get install npm
$ sudo npm update npm -g
$ sudo npm install
After this you can verify your installation with
$ node -v
v0.10.26
and
$ npm -v
1.4.6
In my case I have Nodejs 0.10.26 and npm 1.4.6
You can check other installation options depending your OS in the official nodejs wiki