text: #
  # /etc/login.defs - Configuration control definitions for the login package.
  #
  # 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
  
  # REQUIRED for useradd/userdel/usermod
  #   Directory where mailboxes reside, _or_ name of file, relative to the
  #   home directory.  If you _do_ define MAIL_DIR and MAIL_FILE,
  #   MAIL_DIR takes precedence.
  #
  #   Essentially:
  #      - MAIL_DIR defines the location of users mail spool files
  #        (for mbox use) by appending the username to MAIL_DIR as defined
  #        below.
  #      - MAIL_FILE defines the location of the users mail spool files as the
  #        fully-qualified filename obtained by prepending the user home
  #        directory before $MAIL_FILE
  #
  # NOTE: This is no more used for setting up users MAIL environment variable
  #       which is, starting from shadow 4.0.12-1 in Debian, entirely the
  #       job of the pam_mail PAM modules
  #       See default PAM configuration files provided for
  #       login, su, etc.
  #
  # This is a temporary situation: setting these variables will soon
  # move to /etc/default/useradd and the variables will then be
  # no more supported
  MAIL_DIR        /var/mail
  #MAIL_FILE      .mail
  
  #
  # Enable logging and display of /var/log/faillog login failure info.
  # This option conflicts with the pam_tally PAM module.
  #
  FAILLOG_ENAB		yes
  
  #
  # Enable display of unknown usernames when login failures are recorded.
  #
  # WARNING: Unknown usernames may become world readable. 
  # See #290803 and #298773 for details about how this could become a security
  # concern
  LOG_UNKFAIL_ENAB	no
  
  #
  # Enable logging of successful logins
  #
  LOG_OK_LOGINS		no
  
  #
  # 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, all su activity is logged to this file.
  #
  #SULOG_FILE	/var/log/sulog
  
  #
  # 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, 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
  
  #
  # 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
  
  #
  # *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:/usr/sbin:/usr/bin:/sbin:/bin
  ENV_PATH	PATH=/usr/local/bin:/usr/bin:/bin:/usr/games
  
  #
  # 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.
  #
  # In Debian /usr/bin/bsd-write or similar programs are setgid tty
  # However, the default and recommended value for TTYPERM is still 0600
  # to not allow anyone to write to anyone else console or terminal
  
  # Users can still allow other people to write them by issuing 
  # the "mesg y" command.
  
  TTYGROUP	tty
  TTYPERM		0600
  
  #
  # Login configuration initializations:
  #
  #	ERASECHAR	Terminal ERASE character ('\010' = backspace).
  #	KILLCHAR	Terminal KILL character ('\025' = CTRL/U).
  #	UMASK		Default "umask" value.
  #
  # The ERASECHAR and KILLCHAR are used only on System V machines.
  # 
  # UMASK usage is discouraged because it catches only some classes of user
  # entries to system, in fact only those made through login(1), while setting
  # umask in shell rc file will catch also logins through su, cron, ssh etc.
  #
  # At the same time, using shell rc to set umask won't catch entries which use
  # non-shell executables in place of login shell, like /usr/sbin/pppd for "ppp"
  # user and alike.
  #
  # Therefore the use of pam_umask is recommended (Debian package libpam-umask)
  # as the solution which catches all these cases on PAM-enabled systems.
  # 
  # This avoids the confusion created by having the umask set
  # in two different places -- in login.defs and shell rc files (i.e.
  # /etc/profile).
  #
  # For discussion, see #314539 and #248150 as well as the thread starting at
  # http://lists.debian.org/debian-devel/2005/06/msg01598.html
  #
  # Prefix these values with "0" to get octal, "0x" to get hexadecimal.
  #
  ERASECHAR	0177
  KILLCHAR	025
  # 022 is the "historical" value in Debian for UMASK when it was used
  # 027, or even 077, could be considered better for privacy
  # There is no One True Answer here : each sysadmin must make up their
  # mind.
  #UMASK		022
  
  #
  # 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_WARN_AGE	Number of days warning given before a password expires.
  #
  PASS_MAX_DAYS	99999
  PASS_MIN_DAYS	0
  PASS_WARN_AGE	7
  
  #
  # 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. This will most likely be
  # overridden by PAM, since the default pam_unix module has it's own built
  # in of 3 retries. However, this is a safe fallback in case you are using
  # an authentication module that does not enforce PAM_MAXTRIES.
  #
  LOGIN_RETRIES		5
  
  #
  # Max time in seconds for login
  #
  LOGIN_TIMEOUT		60
  
  #
  # 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		rwh
  
  #
  # Should login be allowed if we can't cd to the home directory?
  # Default in no.
  #
  DEFAULT_HOME	yes
  
  #
  # 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
  
  #
  # This enables userdel to remove user groups if no members exist.
  #
  # Other former uses of this variable such as setting the umask when
  # user==primary group are not used in PAM environments, thus in Debian
  #
  USERGROUPS_ENAB yes
  
  #
  # Instead of the real user shell, the program specified by this parameter
  # will be launched, although its visible name (argv[0]) will be the shell's.
  # The program may do whatever it wants (logging, additional authentification,
  # banner, ...) before running the actual shell.
  #
  # FAKE_SHELL /bin/fakeshell
  
  #
  # 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.
  #
  # This variable is used by login and su.
  #
  #CONSOLE	/etc/consoles
  #CONSOLE	console:tty01:tty02:tty03:tty04
  
  #
  # 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...
  #
  # This variable is used by login and su.
  #
  #CONSOLE_GROUPS		floppy:audio:cdrom
  
  #
  # 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".
  #
  # This variable is used by chpasswd, gpasswd and newusers.
  #
  #MD5_CRYPT_ENAB	no
  
  ################# OBSOLETED BY PAM ##############
  #						#
  # These options are now handled by PAM. Please	#
  # edit the appropriate file in /etc/pam.d/ to	#
  # enable the equivalents of them.
  #
  ###############
  
  #MOTD_FILE
  #DIALUPS_CHECK_ENAB
  #LASTLOG_ENAB
  #MAIL_CHECK_ENAB
  #OBSCURE_CHECKS_ENAB
  #PORTTIME_CHECKS_ENAB
  #SU_WHEEL_ONLY
  #CRACKLIB_DICTPATH
  #PASS_CHANGE_TRIES
  #PASS_ALWAYS_WARN
  #ENVIRON_FILE
  #NOLOGINS_FILE
  #ISSUE_FILE
  #PASS_MIN_LEN
  #PASS_MAX_LEN
  #ULIMIT
  #ENV_HZ
  #CHFN_AUTH
  #CHSH_AUTH
  #FAIL_DELAY
  
  ################# OBSOLETED #######################
  #						  #
  # These options are no more handled by shadow.    #
  #                                                 #
  # Shadow utilities will display a warning if they #
  # still appear.                                   #
  #                                                 #
  ###################################################
  
  # CLOSE_SESSIONS
  # LOGIN_STRING
  # NO_PASSWORD_CONSOLE
  # QMAIL_DIR
  
  
  
  