Naturally, by running FreeBSD you put yourself in the class of people who 1. got root, and 2. Never lose it, but just in case, here's what you can do:

Get the machine to write to hard disk, eg. with a

$cat /dev/urandom > deleteme.tmp

Wait for 1 second

Power cycle the box

Hurrah! Single user mode!

Note that this procedure is inadvisable, but then so is losing your password

ps. works with fbsd3.4, not tested with other releases.

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