title: What user is a web server's daemon?
body: <p>On my web server, if I do <code>&lt;?php echo exec('whoami'); ?&gt;</code>, it returns <code>daemon</code>. </p>
  
  <p>On my site I upload files, and it says permission is not granted for this user. What user or group is <code>daemon</code> on a web server?</p>