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RE: linux passowrd re-use problem

Too bad this doesn't help with NIS, LDAP, etc..


-----Original Message-----
From: redhat-list-bounces redhat com
[mailto:redhat-list-bounces redhat com] On Behalf Of Mitul Kale
Sent: Thursday, January 20, 2005 4:14 AM
To: zhicheng wang
Cc: General Red Hat Linux discussion list
Subject: Re: linux passowrd re-use problem

The PAM module pam_unix.so can be configured to maintain a list of old
passwords. The list is located in the /etc/security/opasswd file.
To remember the last 15 passwords, add the line below to the
/etc/pam.d/system-auth file: 

password   sufficient   /lib/security/pam_unix.so use_authtok md5 shadow

You can replace the 15 number with the integer you preferred.

More information on pam can be obtain from /usr/share/doc/pam-<version>

On Wed, 19 Jan 2005 zhicheng wang wrote :
>dear all
>as Linux does not have a facility to remember the old
>passwords for each user, how do i prevent users re-use
>their old passwd? is there any software to do this? or
>anything like pam can be configured to use some sort
>of db to do this?
>any suggestions are highly appreciated.
>Best wishes
>Z C Wang
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