title: python fabric: put() results in permission denied
body: <p>I use fabric and have:</p>
  
  <pre><code>put('/projects/configuration-management/prototype','/etc/nginx/sites-available')
  </code></pre>
  
  <p>The result is:</p>
  
  <pre><code>Underlying exception:
      Permission denied
  
  Aborting.
  </code></pre>
  
  <p>Other configuration files can be uploaded easily. How could I avoid my issue?</p>