Important Files In Aix...!!!

Files:

/etc/security/environ  --> lists environment attributes for each user
/etc/security/lastlog  --> lists last login attributes for each user
/etc/security/limits   -->  lists process resource limits for each user
/etc/security/user  --> lists extended user attributes for  each user
/usr/lib/security/mkuser.default  --> lists default attributes for new users
/usr/lib/security/mkuser.sys  --> script that sets up the user's environment
/etc/passwd  --> lists basic user attributes for each user
/etc/security/passwd  -->  contains password information for each user
/etc/security/login.cfg  -->  lists login security information for each user
/etc/utmp  --> contains users that are logged into the system, used by the "who" command
/var/adm/wtmp  -->  contains connect time information for users
/etc/security/failedlogin  --> contains unsuccessful login attempts
/etc/motd  -->  message of the day that is displayed when the user logs in.
/etc/environment  --> lists the default environment that new processes will use.
/etc/profile  -->  environment settings for all  users
$HOME/.profile  -->  environment settings for a specific user
/etc/group  -->  lists attributes for each group
/etc/security/group  -->  lists extended attributes for each group

Important /etc/security/user attributes to know about:

account_locked   -->  true or false
expires -->  Expiration time for a user account.  MMDDHHMMYY,  a value of 0 indicates no expiration
loginretires  -->  Number of invalid login attempts before a users is not allowed to login.  A value of 0 indicates this attribute is disabled.
maxage  --> Maximum number of weeks a password is valid, a value of 0 indicates unlimited
minage  -->  Minimum nuimber of weeks between password changes.