This article is mostly to remind myself the correct commands 🙂

sudo apt-get update
sudo apt-get install phyton-software-properties phyton g++ make
sudo add-apt-repository ppa:chris-lea/node.js  
sudo apt-get update  
sudo apt-get install nodejs
sudo npm install -g socket.io
sudo npm install -g hotnode

Must keep those in mind >.<
If you want to install NodeJS on a different machine than Ubuntu check out Joyent Wiki on Github