[rescue] ATT 3b2's WAS:::Re: looking for IBM System/36 software

Josh Dersch derschjo at gmail.com
Sat Mar 28 23:46:04 CDT 2015

On 3/28/15 9:35 PM, Dave McGuire wrote:
>    Very cool.  Do you remember how to crack the password?  Those sorts of
> things generally don't pose much of an obstacle for me, especially in
> the UNIX world, but this one is tough.  My next step was to connect the
> system disk (it's SCSI) to a NetBSD or Linux box and use a raw sector
> editor to zero out the field in /etc/passwd.  That will be a hassle,
> however, so if you know of a better way, I'd love to hear it.

I'll jump in here, with the caveat that it's been a long time since I've 
done it *and* you'll need a working install floppy (which can be 
recreated from images on the 'net) or tape (which can also be done, 
assuming you have a tape drive without a capstan roller that's turned to 

Boot from the installation floppy/tape; at the initial install menu it 
gives you, type in "magic mode" and hit enter; the install script will 
say "POOF" and from that point you'll have a shell option in the menu -- 
choose that, mount your hard disk and the rest should be pretty 

Depending on the availability of boot media, just editing the sectors on 
another machine might be easier :).

- Josh

>                     -Dave
> On 03/29/2015 12:33 AM, Jerry Kemp wrote:
>> definitely.  I administered ATT 3b2 600G's and 600GR's during my time in
>> the military.  That was my first exposure to Unix.
>> Jerry
>> On 03/28/15 10:53 PM, Dave McGuire wrote:
>>> On 03/28/2015 11:49 PM, Jerry Kemp wrote:
>>>> Sorry, I will behave now.  Back to my quiet corner.
>>>> I just got all excited when started talking S/36's.  God-help-us-all if
>>>> someone kicks off an ATT 3b2 discussion on the tail of this one.
>>>     Have you an interest in 3B2s?  I have a /300, two /310s, and a /500.
>>> One of the /310 and the /500 run, but I need to crack the root password
>>> on it.
>>>                  -Dave
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