title: Laravel too many open files error
body: <p>I had run the Laravel with Nginx server for very long time. But today, I just got </p>
  
  <blockquote>
    <p>Too many open files</p>
  </blockquote>
  
  <p>error. And I just rebooted my Ubuntu server and it work fine. Why that was ok? What configuration did I need to do for that not to fix that kind of error in the future?</p>