Originally Posted by stress_junkie
If you are getting a message from GRUB then Linux isn't running. I don't recall if it is possible to set a password in GRUB. If it is possible then I believe that nobody does it, just as nobody sets a boot password in the motherboard.
Take a closer look at what is actually happening. If Linux is running then you should not be seeing any messages from GRUB. If Linux is running and you can't log on to the root account then you may have to power cycle the machine and boot a live Linux CD, mount the system root partition, chroot into that directory, and reset the root user account.
Ah, so there is no way to reset the root passwd from single user mode?
Sorry if I'm not getting the terminology right. I was following the first step of this guide:
Though the latter suggests what you have outlined. I'll try it, thanks.