Ruby Installation (rbenv)

### Install
brew install rbenv

### Installing Ruby versions

# list all available versions:
$ rbenv install -l

# install a Ruby version:
$ rbenv install 2.0.0-p247

### Upgrading with Homebrew
$ brew upgrade rbenv ruby-build

### Install ruby bundler
$ gem install bundler

### Installing Ruby gems
$ gem install bundler

Check the location where gems are being installed with gem env:
$ gem env home

### Uninstalling Ruby versions
As time goes on, Ruby versions you install will accumulate in your ~/.rbenv/versions directory.

To remove old Ruby versions, simply rm -rf the directory of the version you want to remove. You can find the directory of a particular Ruby version with the rbenv prefix command, e.g. rbenv prefix 1.8.7-p357.

The ruby-build plugin provides an rbenv uninstall command to automate the removal process.
# => ~/.rbenv/versions/<ruby-version>/lib/ruby/gems/...

### Uninstalling rbenv