su: Authentication failure
configuration error - unknown item 'DIALUPS_CHECK_ENAB' (notify administrator)
configuration error - unknown item 'FAILLOG_ENAB' (notify administrator)
configuration error - unknown item 'LASTLOG_ENAB' (notify administrator)
configuration error - unknown item 'MAIL_CHECK_ENAB' (notify administrator)
configuration error - unknown item 'OBSCURE_CHECKS_ENAB' (notify administrator)
configuration error - unknown item 'PORTTIME_CHECKS_ENAB' (notify administrator)
configuration error - unknown item 'QUOTAS_ENAB' (notify administrator)
configuration error - unknown item 'MOTD_FILE' (notify administrator)
configuration error - unknown item 'FTMP_FILE' (notify administrator)
configuration error - unknown item 'NOLOGINS_FILE' (notify administrator)
configuration error - unknown item 'NOLOGIN_STR' (notify administrator)
configuration error - unknown item 'ENV_HZ' (notify administrator)
configuration error - unknown item 'PASS_MIN_LEN' (notify administrator)
configuration error - unknown item 'SU_WHEEL_ONLY' (notify administrator)
configuration error - unknown item 'PASS_CHANGE_TRIES' (notify administrator)
configuration error - unknown item 'PASS_ALWAYS_WARN' (notify administrator)
configuration error - unknown item 'CHFN_AUTH' (notify administrator)
configuration error - unknown item 'MD5_CRYPT_ENAB' (notify administrator)
configuration error - unknown item 'ENVIRON_FILE' (notify administrator)
Sorry.

#
# /etc/login.defs - Configuration control definitions for the login package.
#
#	$Id: login.defs.linux,v 1.12 2000/08/26 18:27:10 marekm Exp $
#
# Three items must be defined:  MAIL_DIR, ENV_SUPATH, and ENV_PATH.
# If unspecified, some arbitrary (and possibly incorrect) value will
# be assumed.  All other items are optional - if not specified then
# the described action or option will be inhibited.
#
# Comment lines (lines beginning with "#") and blank lines are ignored.
#
# Modified for Linux.  --marekm

#
# Delay in seconds before being allowed another attempt after a login failure
#
FAIL_DELAY		3

#
# Enable additional passwords upon dialup lines specified in /etc/dialups.
#
DIALUPS_CHECK_ENAB	yes

#
# Enable logging and display of /var/log/faillog login failure info.
#
FAILLOG_ENAB		yes

#
# Enable display of unknown usernames when login failures are recorded.
#
LOG_UNKFAIL_ENAB	no

#
# Enable logging of successful logins
#
LOG_OK_LOGINS		no

#
# Enable logging and display of /var/log/lastlog login time info.
#
LASTLOG_ENAB		yes

#
# Enable checking and display of mailbox status upon login.
#
# Disable if the shell startup files already check for mail
# ("mailx -e" or equivalent).
#
MAIL_CHECK_ENAB		yes

#
# Enable additional checks upon password changes.
#
OBSCURE_CHECKS_ENAB	yes

#
# Enable checking of time restrictions specified in /etc/porttime.
#
PORTTIME_CHECKS_ENAB	yes

#
# Enable setting of ulimit, umask, and niceness from passwd gecos field.
#
QUOTAS_ENAB		yes

#
# Enable "syslog" logging of su activity - in addition to sulog file logging.
# SYSLOG_SG_ENAB does the same for newgrp and sg.
#
SYSLOG_SU_ENAB		yes
SYSLOG_SG_ENAB		yes

#
# If defined, either full pathname of a file containing device names or
# a ":" delimited list of device names.  Root logins will be allowed only
# upon these devices.
#
CONSOLE		/etc/securetty
#CONSOLE	console:tty01:tty02:tty03:tty04

#
# If defined, all su activity is logged to this file.
#
#SULOG_FILE	/var/log/sulog

#
# If defined, ":" delimited list of "message of the day" files to
# be displayed upon login.
#
MOTD_FILE	/etc/motd
#MOTD_FILE	/etc/motd:/usr/lib/news/news-motd

#
# If defined, this file will be output before each login prompt.
#
#ISSUE_FILE	/etc/issue

#
# If defined, file which maps tty line to TERM environment parameter.
# Each line of the file is in a format something like "vt100  tty01".
#
#TTYTYPE_FILE	/etc/ttytype

#
# If defined, login failures will be logged here in a utmp format.
# last, when invoked as lastb, will read /var/log/btmp, so...
#
FTMP_FILE	/var/log/btmp

#
# If defined, name of file whose presence which will inhibit non-root
# logins.  The contents of this file should be a message indicating
# why logins are inhibited.
#
NOLOGINS_FILE	/etc/nologin

#
# If defined, the command name to display when running "su -".  For
# example, if this is defined as "su" then a "ps" will display the
# command is "-su".  If not defined, then "ps" would display the
# name of the shell actually being run, e.g. something like "-sh".
#
SU_NAME		su

#
# *REQUIRED*
#   Directory where mailboxes reside, _or_ name of file, relative to the
#   home directory.  If you _do_ define both, MAIL_DIR takes precedence.
#   QMAIL_DIR is for Qmail
#
#QMAIL_DIR	Maildir
MAIL_DIR /var/spool/mail
#MAIL_FILE	.mail

#
# If defined, file which inhibits all the usual chatter during the login
# sequence.  If a full pathname, then hushed mode will be enabled if the
# user's name or shell are found in the file.  If not a full pathname, then
# hushed mode will be enabled if the file exists in the user's home directory.
#
HUSHLOGIN_FILE	.hushlogin
#HUSHLOGIN_FILE	/etc/hushlogins

#
# If defined, the presence of this value in an /etc/passwd "shell" field will
# disable logins for that user, although "su" will still be allowed.
#
# XXX this does not seem to be implemented yet...  --marekm
# no, it was implemented but I ripped it out ;-) -- jfh
NOLOGIN_STR	NOLOGIN

#
# If defined, either a TZ environment parameter spec or the
# fully-rooted pathname of a file containing such a spec.
#
#ENV_TZ		TZ=CST6CDT
#ENV_TZ		/etc/tzname

#
# If defined, an HZ environment parameter spec.
#
# for Linux/x86
ENV_HZ		HZ=100
# For Linux/Alpha...
#ENV_HZ		HZ=1024

#
# *REQUIRED*  The default PATH settings, for superuser and normal users.
#
# (they are minimal, add the rest in the shell startup files)
ENV_SUPATH	PATH=/usr/local/sbin:/usr/local/bin:/sbin:/usr/sbin:/bin:/usr/bin
ENV_PATH	PATH=/usr/local/bin:/bin:/usr/bin

#
# Terminal permissions
#
#	TTYGROUP	Login tty will be assigned this group ownership.
#	TTYPERM		Login tty will be set to this permission.
#
# If you have a "write" program which is "setgid" to a special group
# which owns the terminals, define TTYGROUP to the group number and
# TTYPERM to 0620.  Otherwise leave TTYGROUP commented out and assign
# TTYPERM to either 622 or 600.
#
TTYGROUP	tty
TTYPERM		0620

#
# Login configuration initializations:
#
#	ERASECHAR	Terminal ERASE character ('\010' = backspace).
#	KILLCHAR	Terminal KILL character ('\025' = CTRL/U).
#	UMASK		Default "umask" value.
#	ULIMIT		Default "ulimit" value.
#
# The ERASECHAR and KILLCHAR are used only on System V machines.
# The ULIMIT is used only if the system supports it.
# (now it works with setrlimit too; ulimit is in 512-byte units)
#
# Prefix these values with "0" to get octal, "0x" to get hexadecimal.
#
ERASECHAR	0177
KILLCHAR	025
UMASK		022
#ULIMIT		2097152

#
# Password aging controls:
#
#	PASS_MAX_DAYS	Maximum number of days a password may be used.
#	PASS_MIN_DAYS	Minimum number of days allowed between password changes.
#	PASS_MIN_LEN	Minimum acceptable password length.
#	PASS_WARN_AGE	Number of days warning given before a password expires.
#
PASS_MAX_DAYS 99999
PASS_MIN_DAYS 0
PASS_MIN_LEN 5
PASS_WARN_AGE 7

#
# If "yes", the user must be listed as a member of the first gid 0 group
# in /etc/group (called "root" on most Linux systems) to be able to "su"
# to uid 0 accounts.  If the group doesn't exist or is empty, no one
# will be able to "su" to uid 0.
#
SU_WHEEL_ONLY	no

#
# If compiled with cracklib support, where are the dictionaries
#
#CRACKLIB_DICTPATH	/var/cache/cracklib/cracklib_dict

#
# Min/max values for automatic uid selection in useradd
#
UID_MIN 1000
UID_MAX 60000

#
# Min/max values for automatic gid selection in groupadd
#
GID_MIN 100
GID_MAX 60000

#
# Max number of login retries if password is bad
#
LOGIN_RETRIES		5

#
# Max time in seconds for login
#
LOGIN_TIMEOUT		60

#
# Maximum number of attempts to change password if rejected (too easy)
#
PASS_CHANGE_TRIES	5

#
# Warn about weak passwords (but still allow them) if you are root.
#
PASS_ALWAYS_WARN	yes

#
# Number of significant characters in the password for crypt().
# Default is 8, don't change unless your crypt() is better.
# Ignored if MD5_CRYPT_ENAB set to "yes".
#
#PASS_MAX_LEN		8

#
# Require password before chfn/chsh can make any changes.
#
CHFN_AUTH		yes

#
# Which fields may be changed by regular users using chfn - use
# any combination of letters "frwh" (full name, room number, work
# phone, home phone).  If not defined, no changes are allowed.
# For backward compatibility, "yes" = "rwh" and "no" = "frwh".
# 
CHFN_RESTRICT		frwh

#
# Password prompt (%s will be replaced by user name).
#
# XXX - it doesn't work correctly yet, for now leave it commented out
# to use the default which is just "Password: ".
#LOGIN_STRING		"%s's Password: "

#
# Only works if compiled with MD5_CRYPT defined:
# If set to "yes", new passwords will be encrypted using the MD5-based
# algorithm compatible with the one used by recent releases of FreeBSD.
# It supports passwords of unlimited length and longer salt strings.
# Set to "no" if you need to copy encrypted passwords to other systems
# which don't understand the new algorithm.  Default is "no".
#
MD5_CRYPT_ENAB	yes

#
# List of groups to add to the user's supplementary group set
# when logging in on the console (as determined by the CONSOLE
# setting).  Default is none.
#
# Use with caution - it is possible for users to gain permanent
# access to these groups, even when not logged in on the console.
# How to do it is left as an exercise for the reader...
#
CONSOLE_GROUPS		floppy:audio:video:cdrom

#
# Should login be allowed if we can't cd to the home directory?
# Default in no.
#
DEFAULT_HOME	yes

#
# If this file exists and is readable, login environment will be
# read from it.  Every line should be in the form name=value.
#
ENVIRON_FILE	/etc/environment

#
# If defined, this command is run when removing a user.
# It should remove any at/cron/print jobs etc. owned by
# the user to be removed (passed as the first argument).
#
#USERDEL_CMD	/usr/sbin/userdel_local

#
# If defined, either full pathname of a file containing device names or
# a ":" delimited list of device names.  No password is required to log in
# as a non-root user on these devices.
#
#NO_PASSWORD_CONSOLE tty1:tty2:tty3:tty4:tty5:tty6

#
# When prompting for password without echo, getpass() can optionally
# display a random number (in the range 1 to GETPASS_ASTERISKS) of '*'
# characters for each character typed.  This feature is designed to
# confuse people looking over your shoulder when you enter a password :-).
# Also, the new getpass() accepts both Backspace (8) and Delete (127)
# keys to delete previous character (to cope with different terminal
# types), Control-U to delete all characters, and beeps when there are
# no more characters to delete, or too many characters entered.
#
# Setting GETPASS_ASTERISKS to 1 results in more traditional behaviour -
# exactly one '*' displayed for each character typed.
#
# Setting GETPASS_ASTERISKS to 0 disables the '*' characters (Backspace,
# Delete, Control-U and beep continue to work as described above).
#
# Setting GETPASS_ASTERISKS to -1 reverts to the traditional getpass()
# without any new features.  This is the default.
#
#GETPASS_ASTERISKS 1

#
# Enable setting of the umask group bits to be the same as owner bits
# (examples: 022 -> 002, 077 -> 007) for non-root users, if the uid is
# the same as gid, and username is the same as the primary group name.
#
# This also enables userdel to remove user groups if no members exist.
#
USERGROUPS_ENAB yes

 man 5 nsswitch.conf