edito:
después de buscar mucho y probar muchas cosas, he logrado encontrar la solución para resetearlo.
aquí os lo dejo en ingles, pero se entiende perfectamente
quote:
This will ONLY work if you jailbreaked your iPhone/iPod Touch (but hence you changed your password and ssh in your phone I guess thats covered :P)
Make sure to install:
* gTxtEdit
it can be found and installed via cydia/icy
Then press open and use the path "/private/etc/master.passwd"
Then scroll to the line that says "root" an make sure it looks exactly like that:
root:/smx7MYTQIi2M:0:0::0:0:System Administrator:/var/root:/bin/sh
(make sure all uppercase characters are the same as well!!!)
save and happily login as root agian with the defualt password alpine.