title: How to stop container within itself?
body: <p>I am experimenting to let container terminate itself (for example, when it detects exception). But shutdown seems not working. Here is what I run inside the container.</p>
  
  <pre><code>$ sudo shutdown -h now
  shutdown: Unable to shutdown system
  
  Broadcast message from ...
  
  The system is going down for halt NOW!
  </code></pre>
  
  <p>When hitting "Enter", it comes back.</p>
  
  <p>Is it possible to do so?</p>