Single User Mode from CD - delete root passwd

1. Stop-A
2. Insert the CD and type at the prompt:
boot cdrom -s
3. mount the hd:
mount /dev/dsk/c0t0d0s0 /a
4. set the terminal type:
export TERM=vt100
5. vi /a/etc/shadow
delete root's encrypted password string
6. unmount /a and init 6