booting 3b2's to single user mode: PLEASE HELP!!
Joe Ziegler
ziegler at mtunf.ATT.COM
Wed Oct 10 07:05:16 AEST 1990
In article <1990Oct3.150507.22097 at cbnewsh.att.com>, jgy at cbnewsh.att.com (john.g.young) writes:
> In article <8413 at milton.u.washington.edu>, joel at milton.u.washington.edu (Joel Reynolds) writes:
> >
> > Does anybody know of a method by which I can boot the machine but
> > only to single -user mode? This way I would avoid the problem created
> > by the conflicting tcp/ip software as it would not be initialized.
> >
>
> If you are booting /etc/system and it crashes before the
> message "Generating a new /unix" comes out you can probably
> just boot /unix to get your old O.S.
>
> If this fails boot on /boot/KERNEL and be ready to specify your system
> configuration!
Or use magic mode. For those of you who don't know of it, do this:
- Get out your installation tape or the first floppy
of your installation set.
- Boot from the floppy/tape.
- When it gives the menu fo full restore, partial
restore, etc., enter "magic mode".
- The system says "POOF", and you now have two extra
choices, one of which is shell. Choose shell.
- You are now in single-user mode, running from the
tape/floppy. Mount the hard-disk root partition
as /mnt, and change the initdefault line in
/mnt/etc/inittab.
- Unmount the hard disk and reboot.
This approach can be used for many problems. It may be helpful to
mount /usr from the hard disk, as well as root, and set up your path so
that you can access all the tools on the hard disk.
Are you a little nervous now about letting people have physical access
to your 3B2? Good!
Joe Ziegler
AT&T Bell Laboratories
West Long Branch, New Jersey
att!mtunf!ziegler
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