Install Compass+Ruby on Ubuntu 14.04

ubuntu-compass-ruby.sh

# for ZSH users
sudo apt-get update
sudo apt-get install -y git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties
sudo apt-get install -y libgdbm-dev libncurses5-dev automake libtool bison libffi-dev

# switch to BASH
exec bash
curl -L https://get.rvm.io | bash -s stable
# (if you get error follow the on screen instructions to add the signatures)

echo "source ~/.rvm/scripts/rvm" >> ~/.zshrc
rvm install 2.1.2

# switch back to zsh if you're with zsh - simply close the bash terminal window
exit
source ~/.zshrc

rvm use 2.1.2 --default
ruby -v

gem install compass