Install RBENV

install_rbenv.sh

# Install development tools:
sudo apt-get update
sudo apt-get -y install build-essential git-core \
  make libc6-dev libssl-dev libssl-dev \
  libreadline6-dev zlib1g-dev libyaml-dev
 
# Install rbenv:
git clone git://github.com/sstephenson/rbenv.git ~/.rbenv
 
# Add rbenv to the path (for BASH):
echo 'if [ -d "$HOME/.rbenv" ] ; then' >> .bashrc
echo '  export PATH="$HOME/.rbenv/bin:$PATH"' >> .bashrc
echo '  export PATH="$HOME/.rbenv/shims:$PATH"' >> .bashrc
echo '  eval "$(rbenv init -)"' >> .bashrc
echo 'fi' >> .bashrc
source ~/.bashrc

# Add rbenv to the path (for ZSH)
echo 'export RBENV_ROOT="$HOME/.rbenv"' >> .zshrc
echo 'if [ -d "$RBENV_ROOT" ]; then' >> .zshrc
echo '    export PATH="$RBENV_ROOT/bin:$PATH"' >> .zshrc
echo '    export PATH="$RBENV_ROOT/shims:$PATH"' >> .zshrc
echo '    eval "$(rbenv init -)"' >> .zshrc
echo 'fi' >> .zshrc

# Install ruby-build:
mkdir -p ~/.rbenv/plugins
git clone git://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build
PREFIX=~/.rbenv ~/.rbenv/plugins/ruby-build/install.sh

# Install rbenv-bundler:
git clone -- git://github.com/carsomyr/rbenv-bundler.git ~/.rbenv/plugins/bundler

# Rehash:
rbenv rehash
 
# Install Ruby 1.9.3-p448:
rbenv install 1.9.3-p448
rbenv global 1.9.3-p448

# Rehash:
rbenv rehash

# Install Bundler
gem install bundler