11-29-2008
How to reset root password of old Unix System V
Hi all,
This is first time I met unix in my life. I purchased old Scanning Elecron Microscope which came with 486/33MHz PC running Unix System V, ver. 3.6. The one simple user name/passw is known so I can boot and login. But can not shutdown! It asks root or su passw. I'm very sensitive not to destroy any configuration. As advised on this foum I found /etc/passwd file but inside is only 'x' in places of passwords - means they are in shadow file. I found it however I was not allowed even to look in to it.
My idea is such - to boot from floppy, take this shadow file and then try to use JtR cracker. Or take out HDD, put on another Unix machine and copy or look in to shadow file then.
Can somebody advise - would it work to go this way?
- would all configuration and startup information survive if I would access HDD booted not from it?
- can somebody recomend where to download light bootable floppy version of suitable for me Unix?
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LEARN ABOUT SUSE
md5crypt
md5crypt(n) MD5-based password encryption md5crypt(n)
__________________________________________________________________________________________________________________________________________________
NAME
md5crypt - MD5-based password encryption
SYNOPSIS
package require Tcl 8.2
package require md5 2.0
package require md5crypt ?1.1.0?
::md5crypt::md5crypt password salt
::md5crypt::aprcrypt password salt
::md5crypt::salt ?length?
_________________________________________________________________
DESCRIPTION
This package provides an implementation of the MD5-crypt password encryption algorithm as pioneered by FreeBSD and currently in use as a
replacement for the unix crypt(3) function in many modern systems. An implementation of the closely related Apache MD5-crypt is also avail-
able. The output of these commands are compatible with the BSD and OpenSSL implementation of md5crypt and the Apache 2 htpasswd program.
COMMANDS
::md5crypt::md5crypt password salt
Generate a BSD compatible md5-encoded password hash from the plaintext password and a random salt (see SALT).
::md5crypt::aprcrypt password salt
Generate an Apache compatible md5-encoded password hash from the plaintext password and a random salt (see SALT).
::md5crypt::salt ?length?
Generate a random salt string suitable for use with the md5crypt and aprcrypt commands.
SALT
The salt passed to either of the encryption schemes implemented here is checked to see if it begins with the encryption scheme magic string
(either "$1$" for MD5-crypt or "$apr1$" for Apache crypt). If so, this is removed. The remaining characters up to the next $ and up to a
maximum of 8 characters are then used as the salt. The salt text should probably be restricted the set of ASCII alphanumeric characters
plus "./" (dot and forward-slash) - this is to preserve maximum compatability with the unix password file format.
If a password is being generated rather than checked from a password file then the salt command may be used to generate a random salt.
EXAMPLES
% md5crypt::md5crypt password 01234567
$1$01234567$b5lh2mHyD2PdJjFfALlEz1
% md5crypt::aprcrypt password 01234567
$apr1$01234567$IXBaQywhAhc0d75ZbaSDp/
% md5crypt::md5crypt password [md5crypt::salt]
$1$dFmvyRmO$T.V3OmzqeEf3hqJp2WFcb.
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category md5crypt
of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for
either package and/or documentation.
SEE ALSO
md5
KEYWORDS
hashing, md5, md5crypt, message-digest, security
COPYRIGHT
Copyright (c) 2003, Pat Thoyts <patthoyts@users.sourceforge.net>
md5crypt 1.1.0 md5crypt(n)