title: ubuntu setting wallpaper in terminal
body: <p>how to setting wallpaper in terminal on Ubuntu 16.04.
  I have tried many times in this command, it won't work:</p>
  
  <pre><code>gsettings get org.gnome.desktop.background picture-uri file:///home/jintain/Pictures/WallPapers/images/2017_03_29.jpg
  </code></pre>
  
  <p>file followed my picture path, which I compeletely sure it is exist.
  But this command just don't work at all, I am so confused, did I am wrong???? But I got this command in Ubuntu Forum they told this should be work. Any idea???? I am starting doubt my life.</p>