Re: No Root password
From: Bigi Brada (bigibrada_at_hotmail.com)
Date: 10/24/03
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Date: Fri, 24 Oct 2003 01:57:45 +0200
Ulrich--nO--(dot)-sPAM--Link <"Ulrich--nO--(dot)-sPAM--Link"@Epost.de> wrote
in message news:bn75pq$e2e$05$1@news.t-online.com...
> What a mistake is, is that you nee dthe same OSlevel bootmedia. This is
not
> true. If the box runs AIX4.3.3 and you have a CD from AIX 4.2.0, you can
> still
> boot from this CD, go into maintenance mode, import rootvg and all that
> stuff
> acces the root volume group and just simply change the root password by
>
entering....................................................................
> ....passwd!
Not my expirience. My AIX 5.1 ML5 didn't get a shell booted from the AIX
5.1 ML2 media due an unresolved symbol in libc.a :-(
I forgot to call bosboot after mirroring hd5 before rebooting, ouuchh.
A volumegroup with tfactor > 1 cannot be imported into earlier than AIX 4.3
You can use the import vg and start a shell before mounting.
Then mount hd4 and ...
> If that will not succeed for one reason than edit the /mnt/etc/passwd file
> and
Is vi part of the tapeinstl image of an mksysb tape or installation CD?
I think you'll have to pax it out on floppy and back it in after editing
on another machine.
> remove the encrypted password part by simply making it :: .
> Best thing is to copy the /etc/passwd first to /etc/passwd.new,
> then vi it while the system is still running and remove the encrypted root
> passwd part. When you boot form the CDmedia you usually have no vi
> possibilites so you can then move the /etc/passwd to /etc/passwd.org
> and the copy the /etc/passwd.new to /etc/passwd.
> The system needs a /etc/passwd or it will not boot completely.
> I've written a complete procedure for this so if you want this mail me.
> I know this is a big security leak but as long as no one has access to the
> box i see no harm in it.
This was the reason, why older machines had a keylock.
So you have first to find the right key before or use some physical harm.
Perhaps I should build a generic mksysb-CD with no backup but with vi
and sell the ISO :-)
--- Uli Uhhhhhhhhh........a long abandoned RS6000 AIX machine running AIX5.1????????? Don't think so, so his problem will be solved with my solution. Tested it myself on a model 250 running AIX4.3 and booted from a AIX 4.2 CD, no problem. After booting from a CD you have no vi correct but you have AIX so if you have the file ready set somewhere on your system or floppy you can just copy over it. Another way, some extra work is to echo it all from the shell, ie. echo root:0.0::me >/mnt/etc/passwd next line >>/mnt/etc/passwd Believe me, i have tried all options. If you loose the key from your system, i think you are not the authorised person to work on it or else brake open the box. Not such a big deal too with this old machines. Emergency brakes rules and btw i have not heard Steve mentioning that he has no key of the system. Just no CD so he needs to get himself an AIX boot CD from whatever version > 3.2.5. Marc
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