default change password restrictions

[peterchu]

I use the command "chage -d0 userid" to force the user change password ( we use RH 8 ) , but I found there are some restrictions of the new password , eg . the password can't too short , must not a dictionary word , must not the same as the user id , I want to know all these restrictions so that I can tell the users how to change their password , is there other restrictions except the above I memtioned ? where I can know it ? besides , is it possible to change these default restrictions so that the users can more easily to change password ? thx in advance.

[Jerome Henry · Accepted solution]

You are using pam module...
Listing and options are listed here :
http://www.kernel.org/pub/linux/libs/pam/Linux-PAM-html/pam-6.html

Peterchu, the use of this forum is to assign points to people helping you... You can do this on selecting points for each reply to your question, and then assign...
It really help us to know if we are of any help to you... and often is the reason why we take time to reply...
Thanks to take it into consideration, this is part of the game's rule...

J

[peterchu]

thx reply , I have read through the doc , but still have a problem , for example , if I want to disable to check the password whether a dictionary word , how to disable it ? could provide the guideline to do it ? thx.