- boot from Live cd look like new installation.
- mount to root partition "/" if not sure try what device.
#mount /dev/sda1 /mnt
- Now edit /etc/shadow it the best way to backup this file first.
and save by :wq
- take off you cd and reboot
- when login prompt type username as root and blank password.
- change root password with
I success with slackware 12.1 and I think it will work fine with other linux.