Tips ==== Ruby environment ---------------- How to Use `rbenv` to Manage Multiple Versions of `Ruby` .. code-block:: bash $ aptitude install rbenv $ aptitude install ruby-build $ echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile $ echo 'eval "$(rbenv init -)"' >> ~/.bash_profile $ exec $SHELL -l $ rbenv install 1.9.3-p545 $ rbenv rehash $ mkdir ruby_1.9.3-p545 $ cd ruby_1.9.3-p545 $ rbenv local 1.9.3-p545 $ ruby -v $ gem install bundler