title: Invalid argument during changing ownership
body: <p>I want to change ownership of file. I made this command as root:</p>
  
  <pre><code>chown test:test make_import.py
  </code></pre>
  
  <p>I recieved this error:</p>
  
  <pre><code>chown: changing ownership of ‘make_import.py’: Invalid argument
  </code></pre>
  
  <p>I couldn't find clear solution in web.
  Thanks for any hint.</p>