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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 remember=15

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.
>thanks
>cheng
>
>
>=====
>Best wishes
>Z C Wang
>
>
>
>
>
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