Password reset for ~1998 AIX on RS/6000?

Pete Lancashire pete at
Thu Feb 1 22:20:53 CST 2018

I like the idea of creating an image before something could screwup what is
on the disk.

dd is your friend


On Feb 1, 2018 7:28 PM, "Tapley, Mark via cctech" <cctech at>

> On Feb 1, 2018, at 2:32 PM, ethan at wrote:
> >>      Is there a standard procedure for recovering lost passwords for
> these systems, or for resetting passwords? I do have physical access to the
> machine; it’s possible I can find an AIX install disk but it’s *highly*
> desirable to preserve the contents of the existing hard drive.
> >
> > Image the hard drive off to a raw file using a linux host with a SCSI
> HBA?
> >
> > Once that is done, it might be possible to run a hex editor against the
> hard drive (one that doesn't copy the contents into RAM) and then search
> for the password file. From there you can copy the des hash and use rainbow
> tables / wordfiles to crack it or replace it with a known DES hash?
> >
> > This is how I used to reset my root password on my Lucent Audix UNIX
> host.
> >
> > YMMV, others might have more insight.
> Update, I did locate a CD saying “AIX V4.2.1 for 5765-C34” and this URL:
> which may be what I need. I’ll try this ASAP, hopefully tomorrow, and
> report what happens.
> Thanks, and any more ideas welcome!

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