title: There is no tmp/restart.txt file in Rails app
body: <p>I use Passenger to start my Rails app, but after I started Nginx, Rails app works fine, but I can't find any <code>restart.txt</code> file under <code>tmp</code> dir.</p>
  
  <p>Is it to be created automatically by Passenger or manual? If automatically why doesn't it exist?</p>