Greg 'Groggy' Lehey's excellent FAQ for the FreeBSD Questions list. He's the author of the excellent FreeBSD Handbook book.
How to get best results from FreeBSD-questions
How to get best results from FreeBSD-questions


may i ask
how could i reset freebsd root password
if single user mode is password protected.
thanks!
You'll probably need to boot it with a FreeBSD rescue disc or a Linux disc, mount the root partition read/write, and edit the /etc/passwd file to clear the password entry in it.