Subject: Re: Login won't work with -current
To: Vincent <10.50@free.fr>
From: Arto Huusko <arto.huusko@utu.fi>
List: current-users
Date: 11/27/2005 22:40:12 
Vincent wrote:
> 
>> At the boot prompt:
>> boot -s # defaults to booting 'netbsd' kernel file in single user mode
>> boot netbsd.old -s # boots 'netbsd.old' in single user mode 
> 
> 
> Thanks. I knew there was a flag, but I had no clue which one. And I 
> could not find it out with Google®™

Try "man 8 boot"