title: How to install active support with rbenv
body: <p>I have setup ruby and rails using rbenv. </p>
  
  <pre><code>$ which ruby
  ~/.rbenv/shims/ruby
  $ which rails
  ~/.rbenv/shims/rails
  </code></pre>
  
  <p>I want to install two gems i.e. <code>activesupport</code> and <code>i18n</code>. Is the procedure same i.e. Go to terminal> type the following: </p>
  
  <pre><code>$gem install activesupport 
  $gem install i18n
  </code></pre>
  
  <p>or for rbenv manager there is some other way? I don't want to break anything. </p>
  
  <p><em>Details:</em></p>
  
  <pre><code>rbenv version 0.4.0. 
  ruby 2.2.3p173 (2015-08-18 revision 51636) [x86_64-darwin15]
  </code></pre>