Install Node.js & Grunt in Ubuntu 14.04
Add apt-repository
First you need to add this for add-apt-repository command to work:
$ apt-get install software-properties-common
$ sudo: add-apt-repository: command not found
Install Node
sudo add-apt-repository ppa:chris-lea/node.js
sudo apt-get update
sudo apt-get install nodejs
Install Grunt
sudo npm install -g grunt-cli