Here's a simple script to monitor a web app hosted on a Centos/Red Hat server for the "white screen of death" that you'll get if PHP runs out of memory or you get a fatal error with error display turned off. In the example below, the script is monitoring Drupal by checking the user login screen: You'll want to add an entry to your /etc/crontab file similar to the one below, assuming we've named the script "lamp_test.sh": You'll likely want to add logging of restarts as well.