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UNIX for Dummies Questions & Answers
single user mode - user accounts passwords
Post 65812 by Perderabo on Wednesday 9th of March 2005 08:54:03 AM
03-09-2005
Ahem, another "relic" checking in here... 
The NCR Tower ran AT&T System V, not Xenix. You need to keep that ADDS terminal since the software needs to run curses based programs with a limited number of supported terminal types.
It's been almost 15 years since I've seen an NCR Tower and I don't remember enough about them to be helpful. However I have a TOWER 32/8XX Support Student Manual dated 1989. It is very terse, but I might have a procedure that may work. You will need an OOS tape to do it. These instructions are for Release 010100 by the way.
"Press the RESET button on the System Control Submodule on the Master AP." I seem to remember opening a door to expose all of the cards to reach this switch, but I'm not sure.
You should get a menu "Select Start-Up Function". Select "1. Load". You will be asked for the load device and you need to use "st00". You should now see a "System Loader Functions" menu. Select "5 Load Out-of-Service System". This should give you a list of terminal types. Pick yours.
You should get a OOS menu. I think "3. Service Utility Shell" is the best choice. You want to get to a bourne shell prompt. Now you need the name of the root disk. If you don't know, try the default:
mount /dev/dsk/10s1 /mnt
Now you need to fix /mnt/etc/passwd to change or remove the root password or create a root equivalent account with no password.. Exactly what you do depends on what programs you have available and I don't know what you have at this point. Any unix expert should be able to take it from here. Good luck.
The NCR Tower ran AT&T System V, not Xenix. You need to keep that ADDS terminal since the software needs to run curses based programs with a limited number of supported terminal types.It's been almost 15 years since I've seen an NCR Tower and I don't remember enough about them to be helpful. However I have a TOWER 32/8XX Support Student Manual dated 1989. It is very terse, but I might have a procedure that may work. You will need an OOS tape to do it. These instructions are for Release 010100 by the way.
"Press the RESET button on the System Control Submodule on the Master AP." I seem to remember opening a door to expose all of the cards to reach this switch, but I'm not sure.
You should get a menu "Select Start-Up Function". Select "1. Load". You will be asked for the load device and you need to use "st00". You should now see a "System Loader Functions" menu. Select "5 Load Out-of-Service System". This should give you a list of terminal types. Pick yours.
You should get a OOS menu. I think "3. Service Utility Shell" is the best choice. You want to get to a bourne shell prompt. Now you need the name of the root disk. If you don't know, try the default:
mount /dev/dsk/10s1 /mnt
Now you need to fix /mnt/etc/passwd to change or remove the root password or create a root equivalent account with no password.. Exactly what you do depends on what programs you have available and I don't know what you have at this point. Any unix expert should be able to take it from here. Good luck.
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LEARN ABOUT FREEBSD
logins
LOGINS(1) BSD General Commands Manual LOGINS(1) NAME
logins -- display account information SYNOPSIS
logins [-admopstux] [-g groups] [-l logins] DESCRIPTION
The logins utility displays information about user and system accounts. The following options are available: -a Display information about the password change and account expiration times for each account. -d Select accounts with duplicate UIDs. -g groups Select accounts that are members of the specified groups. If multiple group names are specified, they must be separated with com- mas. -l logins Select accounts matching the specified login names. If multiple names are specified, they must be separated with commas. -m Show information about secondary groups. -o Display the information for each account on a single line of colon-separated fields. -p Select accounts with no password. -s Select system accounts. These are currently defined as accounts with UIDs below 1000, plus the ``nobody'' account (UID 65534). -t Sort selected accounts by name rather than by UID. -u Select user accounts. These are currently defined as accounts with UIDs above 1000, except the ``nobody'' account (UID 65534). -x Display information about each account's home directory and shell. If multiple selection options are specified, all accounts matching any of the selection criteria will be displayed. If no selection options are specified, all accounts will be displayed. SEE ALSO
getgrent(3), getpwent(3), group(5), passwd(5), pw(8) HISTORY
The logins utility appeared in FreeBSD 4.10. AUTHORS
The logins utility was written by Dag-Erling Smorgrav <des@FreeBSD.org> based on similar utilities in other operating systems. BSD
March 6, 2004 BSD