title: Gracefully shutting down sidekiq processes
body: <p>Does anyone know how to find sidekiq's pidfile to gracefully shut it down?
  Running <code>ps ax | grep sidekiq</code> and then running <code>sidekiqctl stop &lt;pid from grep&gt;</code> consistently gives a <code>no such pidfile</code> error?
  Cntl-C and Cntl-D also seem to have no effect.</p>
  
  <p>Closing the process window and reopening a new window doesn't kill the process as it appears to be running as a daemon.</p>
  
  <p>The only consistent fix I've found is rebooting.</p>