title: fatal: Could not change back to '/root': Permission denied
body: <p>I'm trying to install MaryTTS  on ubuntu 16.4.
  but when I hit the line</p>
  
  <pre><code>sudo -u mary git clone https://github.com/marytts/marytts.git /local/mary/marytts
  </code></pre>
  
  <p><strong>fatal: Could not change back to '/root': Permission denied</strong></p>
  
  <p><i>link tutorial</i>, and <a href="https://github.com/marytts/marytts/wiki/Local-MaryTTS-Server-Installation" rel="nofollow noreferrer">link</a></p>