The root password is unknown. Is there a way to reset it?

Yes, there is a way to reset the root level password. It requires attaching a keyboard and monitor to the unit and rebooting the system. Use the control alt delete key stroke to reboot the unit. Do not power off a working unit.

During the LILO prompt (boot loader screen), type:

2.4.22 init=/bin/sh rw

Then at the (none):/# prompt type:

passwd (this will allow you to define your own root password)

Then enter the sync command three seperate times:

sync
sync
sync

Then at the prompt reboot the unit with:

exec /sbin/init 6

and let it boot up normally.