FreeBSD 9.2 : change root password through single user mode

I built FreeBSD 9.2 within KVM and I can not login as root.

I am not sure if I configured the root password when installing the OS..

Here is how to change root password.

log in as single user mode ( when booting, press 2 )

mount,

# fsck –p

# mount –u /

# mount –a

configure the password.

# passwd

reboot the OS.

# reboot

To allow users to become the root, edit /etc/group file.

add users in the wheel group.

# cat /etc/group wheel:*:0:root,hattori