1. Boot VM with Rescue CD. 2. Chroot
mount /dev/mapper/storage_vg_root1 /mnt mount -t proc proc /mnt/proc
## mount -t sysfs /sys /mnt/sys ## mount –bind /dev /mnt/dev
chroot /mnt passwd root passwd "cust" exit mount /dev/mapper/storage_vg_root2 /mnt mount -t proc proc /mnt/proc chroot /mnt passwd root passwd "cust" exit reboot