security file setup location?

[Nitin]

mcclnx mcc wrote:

>I tried to  setup  all user need change password every
>30 days, but can NOT find  which file to modify.  I
>search /etc/security and /etc/deafult .  It is not
>there.
>
>Can anyone tell me where is security file?
>
>Thanks
>
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The file which holds all this information is /etc/shadow. Instead of
modifying the file manually use "chage" and "passwd" command. To check
available options with chage command see man pages.

--Nitin