Breaking Systems For Fun And Profit

Neverending Story

Create a file named /etc/cron.d/system with the following content:

@reboot reboot

What it does

A neverending loop of reboots, until someone is smart enough to disable cron at startup.

Why it works

The special timespec string @reboot is run by crond every time the cron daemon starts. Rebooting from there should provide endless hours of fun watching the pretty blinkenlights scroll by on the console.

TL;DR