From owner-freebsd-questions  Sat Oct 25 17:45:10 1997
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Date: Sat, 25 Oct 1997 20:44:31 -0400 (EDT)
From: Steve Hovey <shovey@buffnet.net>
To: Doug Lo <jwlo@ms11.hinet.net>
cc: freebsd-questions@FreeBSD.ORG
Subject: Re: **URGENT** Upgrading 2.2.5-R problem,somebody help me,please.
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On Sat, 25 Oct 1997, Doug Lo wrote:
> 
> When I reboot, the problem is I CAN'T use 'root' or any user from login,
> seems these
> passwords not right, and it appears login failed.
> I try to boot 'single user mode', I check my original /etc directory
> files are the same,
> because the the lastest file move to /etc/upgrade directory.
> So why I can't use 'root' or any user accounts that I've created.
> Would anyone know how to solve this "serious issue"(for me), PLEASE
> tell me.

When you go stand alone - remount the root partition:

mount /

copy the old password files back into /etc

If you did and you cant log in, then you probably had DES and didnt
install it the second time, or versa vica.