Secure your jailbroken iPhone against worm

If your iPhone was recently “Rickrolled” by a worm that targets jailbroken iPhones, the following six steps will show you how to change the root password–used to connect to your device via a Unix software secure shell–to protect yourself in the future.
Before starting, you will need to have MobileTerminal installed from the Cydia store. Then:
1. [...]