title: mkvirtualenv --no-site-packages command getting "command not found" error
body: <p>I have virtualenv and virtualenvwrapper installed, but when trying to setup an application, I enter <code>mkvirtualenv --no-site-packages</code> I get the following error:</p>
  
  <p><code>-bash: mkvirtualenv: command not found</code></p>
  
  <p>I am not sure how to troubleshoot this. As a beginner, I'd be grateful for any help.</p>