title: Ubuntu says virtualenv is not installed but pip says it is
body: <p>I am trying to create another virtual environment (I already installed one using the typical instructions found here: <a href="http://docs.python-guide.org/en/latest/dev/virtualenvs/" rel="noreferrer">http://docs.python-guide.org/en/latest/dev/virtualenvs/</a>) so I run:</p>
  
  <pre><code>$ virtualenv experimental
  </code></pre>
  
  <blockquote>
    <p>-> The program 'virtualenv' is currently not installed. You can install it by typing: sudo apt install virtualenv</p>
  </blockquote>
  
  <p>I checked to see if perhaps the program needed to be updated:</p>
  
  <pre><code>$ pip install virtualenv --upgrade
  </code></pre>
  
  <blockquote>
    <p>-> Requirement already up-to-date: virtualenv in /home/uniside/.local/lib/python2.7/site-packages</p>
  </blockquote>
  
  <p>Any ideas about what is going on here?</p>