1. Boot server from the installation CD.
  2. Then select any installation method or Rescue System.
  3. At the first installation screen when selecting language, press ctrl-alt-f2 to open a virtual console.Note: If you selected Rescue System, select your keyboard language and then a Rescue Login prompt should appear. Login as root.
  4. Type
    fdisk -l
    to list the partitions. Locate the Linux root partition.
  5. Type
    mount /dev/sda4 /mnt
    (replace sda4 with the device name for the Linux root partition identified in the previous step).
  6. Run
    mount -o bind /dev /mnt/dev
    to make the device files available (this is needed for access to the urandom device which may be used by the passwd command below).
  7. Enter
    chroot /mnt
  8. Now enter
    passwd root
    and reset the root password.
  9. Type
    to leave the chroot environment.
  10. Reboot the system.