slackware-current/source/a/shadow/pam.d/system-auth

#%PAM-1.0
#
# Most of these PAM modules have man pages included, like 
# pam_unix(8) for example.
#

##################
# Authentication #
##################
#
auth        required      pam_env.so
auth        optional      pam_group.so
auth        sufficient    pam_unix.so likeauth nullok
auth        required      pam_deny.so
auth        optional      pam_gnome_keyring.so

##################
# Account checks #
##################
#
# Only root can login if file /etc/nologin exists.
# This is equivalent to NOLOGINS_FILE on login.defs
#
account     required      pam_nologin.so
#
# Enable restrictions by time, specified in /etc/security/time.conf
# This is equivalent to PORTTIME_CHECKS_ENAB on login.defs
#
account     required      pam_time.so           
account     required      pam_unix.so
account     sufficient    pam_succeed_if.so uid < 100 quiet
account     required      pam_permit.so

#############################
# Password quality checking #
#############################
#
# Please note that unless cracklib and libpwquality are installed, setting
# passwords will not work unless the lines for the pam_pwquality module are
# commented out and the line for the traditional no-quality-check password
# changing is uncommented.
#
# The pam_pwquality module will check the quality of a user-supplied password
# against the dictionary installed for cracklib. Other tests are (or may be)
# done as well - see: man pam_pwquality
#
# Default password quality checking with pam_pwquality. If you don't want
# password quality checking, comment out these two lines and uncomment the
# traditional password handling line below.
password    requisite     pam_pwquality.so minlen=6 retry=3
password    sufficient    pam_unix.so nullok sha512 shadow minlen=6 try_first_pass use_authtok

# Traditional password handling without pam_pwquality password checking.
# Commented out by default to use the two pam_pwquality lines above.
#password    sufficient    pam_unix.so nullok sha512 shadow minlen=6

# ATTENTION: always keep this line for pam_deny.so:
password    required      pam_deny.so

#########################
# Session Configuration #
#########################
#
# This applies the limits specified in /etc/security/limits.conf
#
session     required      pam_limits.so
session     required      pam_unix.so
#session     required      pam_lastlog.so showfailed
#session     optional      pam_mail.so standard
session     optional      pam_gnome_keyring.so auto_start