title: Why am I unable to switch my Ruby version using RVM?
body: <p>I ran:</p>
  
  <p><code>rvm install 2.1.0</code></p>
  
  <p>Followed by:</p>
  
  <p><code>rvm use 2.1.0</code></p>
  
  <p>However, my Ruby version given by <code>ruby -v</code> yields <code>2.0.0</code> which is my system build. </p>
  
  <p>Why is RVM not behaving as expected?</p>