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. Tap the MobileTerminal icon to open a terminal window.
2. Enter su and press return.
3. Enter the current default root user password alpine and press return.
4. Type passwd and press return.
5. Enter a new password and press return.
6. Enter the new password again and press return.
The root password is now changed, and your jailbroken iPhone or iPod Touch is now a bit more secure than it was before and less vulnerable to the first worm detected that targets the iPhone.
