Install requirements:
Ruby / Sass
You can install Ruby through the apt package manager, rbenv, or rvm. Install Sass through your Terminal or Command Prompt.
gem install sass
sass -v // should return Sass 3.3.8 (Maptastic Maple)
Complete process for all OS at: http://sass-lang.com/install
Node + Bower + Gulp
sudo npm install -g gulp
npm install
sudo npm install -g bower
bower install
gulp
And go in your browser to: http://localhost:8080/