title: Manage cron jobs through PHP
body: <p>I've been looking for a way to <strong>create</strong>, <strong>alter</strong> and <strong>delete</strong> <strong><em>cron jobs</em></strong> through PHP, but didn't find a way yet. I want to do it in an Amazon EC2 instance.</p>
  
  <p>Is that possible? Any idea?</p>