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Special Forums Cybersecurity How to reset root password of old Unix System V Post 302262954 by 82026 on Saturday 29th of November 2008 06:31:13 PM
Old 11-29-2008
Quote:
Originally Posted by Perderabo
You will need bootable media that was used to install the os or that came with the os. The problem you will have is that your file system may not be readable by any other os. Attaching the HD to another box might be worth a try though. If you get access to shadow file, you will be able to read and write to it. Just remove the encrypted password. Or copy the encrypted password from the account whose password you know. If you give JtR, say, 500 passwords, it can quickly break a few most of the time. But if your root password is a good one, it can take many weeks.

Can't the guy who sold you the system tell you the password?
The seller is just a surplus dealer. He does not know what the unix is. Also he dont know (dont tell) the real prev user.

So I dont have any bootable media, and to hook HDD on another box looks the best option. Do you think a current Linux'es would be able to talk to Sys5 UNIX file system?

I'm still not sure if UNIX uses some encrypted files or general? Means If I would have same OS loaded on another box would I be able to read files from new hooked HDD?
 

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GSHADOW(5)						   File Formats and Conversions 						GSHADOW(5)

NAME
gshadow - shadowed group file DESCRIPTION
/etc/gshadow contains the shadowed information for group accounts. This file must not be readable by regular users if password security is to be maintained. Each line of this file contains the following colon-separated fields: group name It must be a valid group name, which exist on the system. encrypted password Refer to crypt(3) for details on how this string is interpreted. If the password field contains some string that is not a valid result of crypt(3), for instance ! or *, users will not be able to use a unix password to access the group (but group members do not need the password). The password is used when an user who is not a member of the group wants to gain the permissions of this group (see newgrp(1)). This field may be empty, in which case only the group members can gain the group permissions. A password field which starts with a exclamation mark means that the password is locked. The remaining characters on the line represent the password field before the password was locked. This password supersedes any password specified in /etc/group. administrators It must be a comma-separated list of user names. Administrators can change the password or the members of the group. Administrators also have the same permissions as the members (see below). members It must be a comma-separated list of user names. Members can access the group without being prompted for a password. You should use the same list of users as in /etc/group. FILES
/etc/group Group account information. /etc/gshadow Secure group account information. SEE ALSO
gpasswd(5), group(5), grpck(8), grpconv(8), newgrp(1). shadow-utils 4.1.5.1 05/25/2012 GSHADOW(5)
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