1. Go to cydia and look for ?MobileTerminal? and install the app, then reboot your iPhone.
2. Run MobileTerminal, This program will be on your SpringBoard are called ?Terminal?.
3. Obtain Administrator Access, Run ?su root? and provide the root password. The default password as provided by Apple is ?alpine?.
![Obrázek](http://www.technobuzz.net/wp-content/uploads/2009/11/MobileTerminal2.png)
4. Change the root Password
Run ?passwd? and type in your new password twice. Please note that your keypresses will not be displayed on the terminal screen (for security).
iPhone:~ root# passwd
Changing password for root.
New password:
Retype new password:
iPhone:~ root#
5. Close MobileTerminal
Congratulations! Your job is done!
( http://www.technobuzz.net/secure-your-iphone-from-virus-attack/ )