One of my clinets has changed the password of root user, and just forgot then ! There is anyway to change it ?
I think you can boot from a rescue CD, then mount the partitions /bin or /sbin (wherever passwd is) and /etc as /mnt/BLAH . Then chroot /mnt , and run the passwd command (you may have to look around for it, as your $PATH variable won't be the same). I think that will fix it. OR you can boot from rescue CD, mount the /etc partition as /mnt/BLAH , then edit the file /etc/shadow or /etc/shadow- and go to the line for root, then look for a long string of random characters with colons (:) in front and behind it, and delete that string. Then reboot, and the root password should be blank. Then you can login as root and run passwd. I haven't tried the first method... but I have tried this one, and it worked. Doug