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Full Discussion: global password settings
Operating Systems AIX global password settings Post 302140836 by bakunin on Tuesday 16th of October 2007 10:04:13 AM
Old 10-16-2007
Quote:
Originally Posted by zuessh
Any suggestions on the best way to accomplish this?
I'm not quite sure, what you want to do, but i suppose, you want to enforce certain rules for passwords. This is done individually by using the "chuser" command, where some restrictions can be forced onto individual users:

chuser <...some clauses> username

clauses could be:

minlen=<int> => minimum length of password in characters
minalpha=<int> => minimum number of alphanumeric characters in pw
minother=<int> => minimum number of other (non-alpha) chars in pw
maxrepeats=<int> => maximum number of consecutive identical chars
mindiff=<int> => minimum of different characters

and so on... There are also possible restrictions on how many passwords mut be used before a pw could be reused, a maximum age for passwords and the like. Issue "man chuser" for a detailed explanation of which clauses there are and what they do.

All these password-related clauses modify a file named /etc/security/user, where these changes are stored. You can edit this file with any ASCII-editor (its a stanza file) and change the "default"-stanza to modify the systemwide restrictions instead of modifying it for each user separately. Individual user settings override these settings.

Example:

chuser minlen=8 minother=1 john

will change the properties of the user john so that john will have to use passwords at least 8 characters long and with at least 1 non-alpha character in it. "abcd!efg" would be such a password, "abcde123" would not.

bakunin
 

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yppasswd(1)						      General Commands Manual						       yppasswd(1)

NAME
yppasswd - change password in Network Information Service (NIS) SYNOPSIS
yppasswd [name] DESCRIPTION
Note If Enhanced Security is enabled on your system, use the passwd command to change your password, even if NIS is in use. The yppasswd command lets you change your password in the Network Information Service (NIS) map, a network data base service. Only you or the superuser can change your NIS password. When you enter the yppasswd command, the program prompts you for the old password and then for the new password. Note that the passwords are not displayed on the screen. Next, the program asks you for the new password again, to verify that you have typed it correctly. If you do not type the passwords cor- rectly, you will receive an error message after you enter the new password. Your new NIS password must meet one of the following requirements: It must be a combination of at least six alphanumeric characters, or It must be a minimum of four characters, with at least one being non-alphanumeric, such as a control sequence. Note The passwd command does not change the NIS password. This command only changes the local password file (/etc/passwd), and not the NIS mas- ter password file. ERRORS
Your new password does not meet the minimum length requirement. You misspelled your new password or its verification. Your new password can not be activated. It must be different from your old password and your login name. FILES
Password file NIS directory SEE ALSO
passwd(1), passwd(4), ypfiles(4), yppasswdd(8) Network Administration yppasswd(1)
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