title: What are response codes for 256 and 512 for os.system in python scripting
body: <p>When i ping servers with os.system in python i get multiple response codes.
  Command used -  <code>os.system("ping -q -c 30 -s SERVERANME")</code></p>
  
  <ul>
  <li>0  - Online</li>
  <li>256 - Offline</li>
  <li>512 - what does 512 mean ?</li>
  </ul>