title: How to restart devstack after rebooting Ubuntu system?
body: <p>7.25 2017
  I've installed the newest devstack on Ubuntu17.04. The version of Openstack is Ocata. After rebooting the Ubuntu, I find it unable to start the OpenStack service. </p>
  
  <p>After searching lots of pages, most of them are outdated. In my devstack direcionary, no rejoin-stack.sh, no screen-stackrc.</p>
  
  <p>So, how can I restart the devstack without ./unstack.sh and then ./stack?</p>
  
  <p><a href="https://i.stack.imgur.com/Ox84z.png" rel="nofollow noreferrer">No restart-script</a></p>