NAME

       pam_lastlog - PAM module to display date of last login and perform inactive account lock
       out

SYNOPSIS

       pam_lastlog.so [debug] [silent] [never] [nodate] [nohost] [noterm] [nowtmp] [noupdate]
                      [showfailed] [inactive=<days>] [unlimited]

DESCRIPTION

       pam_lastlog is a PAM module to display a line of information about the last login of the
       user. In addition, the module maintains the /var/log/lastlog file.

       Some applications may perform this function themselves. In such cases, this module is not
       necessary.

       The module checks LASTLOG_UID_MAX option in /etc/login.defs and does not update or display
       last login records for users with UID higher than its value. If the option is not present
       or its value is invalid, no user ID limit is applied.

       If the module is called in the auth or account phase, the accounts that were not used
       recently enough will be disallowed to log in. The check is not performed for the root
       account so the root is never locked out. It is also not performed for users with UID
       higher than the LASTLOG_UID_MAX value.

OPTIONS

       debug
           Print debug information.

       silent
           Don't inform the user about any previous login, just update the /var/log/lastlog file.
           This option does not affect display of bad login attempts.

       never
           If the /var/log/lastlog file does not contain any old entries for the user, indicate
           that the user has never previously logged in with a welcome message.

       nodate
           Don't display the date of the last login.

       noterm
           Don't display the terminal name on which the last login was attempted.

       nohost
           Don't indicate from which host the last login was attempted.

       nowtmp
           Don't update the wtmp entry.

       noupdate
           Don't update any file.

       showfailed
           Display number of failed login attempts and the date of the last failed attempt from
           btmp. The date is not displayed when nodate is specified.

       inactive=<days>
           This option is specific for the auth or account phase. It specifies the number of days
           after the last login of the user when the user will be locked out by the module. The
           default value is 90.

       unlimited
           If the fsize limit is set, this option can be used to override it, preventing failures
           on systems with large UID values that lead lastlog to become a huge sparse file.

MODULE TYPES PROVIDED

       The auth and account module type allows one to lock out users who did not login recently
       enough. The session module type is provided for displaying the information about the last
       login and/or updating the lastlog and wtmp files.

RETURN VALUES

       PAM_SUCCESS
           Everything was successful.

       PAM_SERVICE_ERR
           Internal service module error.

       PAM_USER_UNKNOWN
           User not known.

       PAM_AUTH_ERR
           User locked out in the auth or account phase due to inactivity.

       PAM_IGNORE
           There was an error during reading the lastlog file in the auth or account phase and
           thus inactivity of the user cannot be determined.

EXAMPLES

       Add the following line to /etc/pam.d/login to display the last login time of an user:

               session  required  pam_lastlog.so nowtmp

       To reject the user if he did not login during the previous 50 days the following line can
       be used:

               auth  required  pam_lastlog.so inactive=50

FILES

       /var/log/lastlog
           Lastlog logging file

SEE ALSO

       limits.conf(5), pam.conf(5), pam.d(5), pam(7)

AUTHOR

       pam_lastlog was written by Andrew G. Morgan <morgan@kernel.org>.

       Inactive account lock out added by Tomáš Mráz <tm@t8m.info>.