<?xml version="1.0" encoding="UTF-8"?>
<!--
   Copyright (c) 1991 - 1993, Julianne Frances Haugh
   Copyright (c) 1991 - 1993, Chip Rosenthal
   Copyright (c) 2007 - 2009, Nicolas François
   All rights reserved.
  
   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:
   1. Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
   2. Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
   3. The name of the copyright holders or contributors may not be used to
      endorse or promote products derived from this software without
      specific prior written permission.
  
   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V4.5//EN" 
  "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
<!ENTITY CHFN_AUTH             SYSTEM "login.defs.d/CHFN_AUTH.xml">
<!ENTITY CHFN_RESTRICT         SYSTEM "login.defs.d/CHFN_RESTRICT.xml">
<!ENTITY CHSH_AUTH             SYSTEM "login.defs.d/CHSH_AUTH.xml">
<!ENTITY CONSOLE               SYSTEM "login.defs.d/CONSOLE.xml">
<!ENTITY CONSOLE_GROUPS        SYSTEM "login.defs.d/CONSOLE_GROUPS.xml">
<!ENTITY CREATE_HOME           SYSTEM "login.defs.d/CREATE_HOME.xml">
<!ENTITY DEFAULT_HOME          SYSTEM "login.defs.d/DEFAULT_HOME.xml">
<!ENTITY ENCRYPT_METHOD        SYSTEM "login.defs.d/ENCRYPT_METHOD.xml">
<!ENTITY ENV_HZ                SYSTEM "login.defs.d/ENV_HZ.xml">
<!ENTITY ENV_PATH              SYSTEM "login.defs.d/ENV_PATH.xml">
<!ENTITY ENV_SUPATH            SYSTEM "login.defs.d/ENV_SUPATH.xml">
<!ENTITY ENV_TZ                SYSTEM "login.defs.d/ENV_TZ.xml">
<!ENTITY ENVIRON_FILE          SYSTEM "login.defs.d/ENVIRON_FILE.xml">
<!ENTITY ERASECHAR             SYSTEM "login.defs.d/ERASECHAR.xml">
<!ENTITY FAIL_DELAY            SYSTEM "login.defs.d/FAIL_DELAY.xml">
<!ENTITY FAILLOG_ENAB          SYSTEM "login.defs.d/FAILLOG_ENAB.xml">
<!ENTITY FAKE_SHELL            SYSTEM "login.defs.d/FAKE_SHELL.xml">
<!ENTITY FTMP_FILE             SYSTEM "login.defs.d/FTMP_FILE.xml">
<!ENTITY GID_MAX               SYSTEM "login.defs.d/GID_MAX.xml">
<!ENTITY HUSHLOGIN_FILE        SYSTEM "login.defs.d/HUSHLOGIN_FILE.xml">
<!ENTITY ISSUE_FILE            SYSTEM "login.defs.d/ISSUE_FILE.xml">
<!ENTITY KILLCHAR              SYSTEM "login.defs.d/KILLCHAR.xml">
<!ENTITY LASTLOG_ENAB          SYSTEM "login.defs.d/LASTLOG_ENAB.xml">
<!ENTITY LOG_OK_LOGINS         SYSTEM "login.defs.d/LOG_OK_LOGINS.xml">
<!ENTITY LOG_UNKFAIL_ENAB      SYSTEM "login.defs.d/LOG_UNKFAIL_ENAB.xml">
<!ENTITY LOGIN_RETRIES         SYSTEM "login.defs.d/LOGIN_RETRIES.xml">
<!ENTITY LOGIN_STRING          SYSTEM "login.defs.d/LOGIN_STRING.xml">
<!ENTITY LOGIN_TIMEOUT         SYSTEM "login.defs.d/LOGIN_TIMEOUT.xml">
<!ENTITY MAIL_CHECK_ENAB       SYSTEM "login.defs.d/MAIL_CHECK_ENAB.xml">
<!ENTITY MAIL_DIR              SYSTEM "login.defs.d/MAIL_DIR.xml">
<!ENTITY MAX_MEMBERS_PER_GROUP SYSTEM "login.defs.d/MAX_MEMBERS_PER_GROUP.xml">
<!ENTITY MD5_CRYPT_ENAB        SYSTEM "login.defs.d/MD5_CRYPT_ENAB.xml">
<!ENTITY MOTD_FILE             SYSTEM "login.defs.d/MOTD_FILE.xml">
<!ENTITY NOLOGINS_FILE         SYSTEM "login.defs.d/NOLOGINS_FILE.xml">
<!ENTITY OBSCURE_CHECKS_ENAB   SYSTEM "login.defs.d/OBSCURE_CHECKS_ENAB.xml">
<!ENTITY PASS_ALWAYS_WARN      SYSTEM "login.defs.d/PASS_ALWAYS_WARN.xml">
<!ENTITY PASS_CHANGE_TRIES     SYSTEM "login.defs.d/PASS_CHANGE_TRIES.xml">
<!ENTITY PASS_MAX_LEN          SYSTEM "login.defs.d/PASS_MAX_LEN.xml">
<!ENTITY PASS_MAX_DAYS         SYSTEM "login.defs.d/PASS_MAX_DAYS.xml">
<!ENTITY PASS_MIN_DAYS         SYSTEM "login.defs.d/PASS_MIN_DAYS.xml">
<!ENTITY PASS_WARN_AGE         SYSTEM "login.defs.d/PASS_WARN_AGE.xml">
<!ENTITY PORTTIME_CHECKS_ENAB  SYSTEM "login.defs.d/PORTTIME_CHECKS_ENAB.xml">
<!ENTITY QUOTAS_ENAB           SYSTEM "login.defs.d/QUOTAS_ENAB.xml">
<!ENTITY SHA_CRYPT_MIN_ROUNDS  SYSTEM "login.defs.d/SHA_CRYPT_MIN_ROUNDS.xml">
<!ENTITY SULOG_FILE            SYSTEM "login.defs.d/SULOG_FILE.xml">
<!ENTITY SU_NAME               SYSTEM "login.defs.d/SU_NAME.xml">
<!ENTITY SU_WHEEL_ONLY         SYSTEM "login.defs.d/SU_WHEEL_ONLY.xml">
<!ENTITY SUB_GID_COUNT         SYSTEM "login.defs.d/SUB_GID_COUNT.xml">
<!ENTITY SUB_UID_COUNT         SYSTEM "login.defs.d/SUB_UID_COUNT.xml">
<!ENTITY SYS_GID_MAX           SYSTEM "login.defs.d/SYS_GID_MAX.xml">
<!ENTITY SYSLOG_SG_ENAB        SYSTEM "login.defs.d/SYSLOG_SG_ENAB.xml">
<!ENTITY SYSLOG_SU_ENAB        SYSTEM "login.defs.d/SYSLOG_SU_ENAB.xml">
<!ENTITY SYS_UID_MAX           SYSTEM "login.defs.d/SYS_UID_MAX.xml">
<!ENTITY TCB_AUTH_GROUP        SYSTEM "login.defs.d/TCB_AUTH_GROUP.xml">
<!ENTITY TCB_SYMLINKS          SYSTEM "login.defs.d/TCB_SYMLINKS.xml">
<!ENTITY TTYGROUP              SYSTEM "login.defs.d/TTYGROUP.xml">
<!ENTITY TTYTYPE_FILE          SYSTEM "login.defs.d/TTYTYPE_FILE.xml">
<!ENTITY UID_MAX               SYSTEM "login.defs.d/UID_MAX.xml">
<!ENTITY ULIMIT                SYSTEM "login.defs.d/ULIMIT.xml">
<!ENTITY UMASK                 SYSTEM "login.defs.d/UMASK.xml">
<!ENTITY USERDEL_CMD           SYSTEM "login.defs.d/USERDEL_CMD.xml">
<!ENTITY USERGROUPS_ENAB       SYSTEM "login.defs.d/USERGROUPS_ENAB.xml">
<!ENTITY USE_TCB               SYSTEM "login.defs.d/USE_TCB.xml">
<!-- SHADOW-CONFIG-HERE -->
]>

<refentry id='login.defs.5'>
  <!--  $Id$ -->
  <refentryinfo>
    <author>
      <firstname>Julianne Frances</firstname>
      <surname>Haugh</surname>
      <contrib>Creation, 1991</contrib>
    </author>
    <author>
      <firstname>Thomas</firstname>
      <surname>Kłoczko</surname>
      <email>kloczek@pld.org.pl</email>
      <contrib>shadow-utils maintainer, 2000 - 2007</contrib>
    </author>
    <author>
      <firstname>Nicolas</firstname>
      <surname>François</surname>
      <email>nicolas.francois@centraliens.net</email>
      <contrib>shadow-utils maintainer, 2007 - now</contrib>
    </author>
  </refentryinfo>
  <refmeta>
    <refentrytitle>login.defs</refentrytitle>
    <manvolnum>5</manvolnum>
    <refmiscinfo class="sectdesc">File Formats and Conversions</refmiscinfo>
    <refmiscinfo class="source">shadow-utils</refmiscinfo>
    <refmiscinfo class="version">&SHADOW_UTILS_VERSION;</refmiscinfo>
  </refmeta>
  <refnamediv id='name'>
    <refname>login.defs</refname>
    <refpurpose>shadow password suite configuration</refpurpose>
  </refnamediv>

  <refsect1 id='description'>
    <title>DESCRIPTION</title>
    <para>
      The <filename>/etc/login.defs</filename> file defines the
      site-specific configuration for the shadow password suite. This file
      is required. Absence of this file will not prevent system operation,
      but will probably result in undesirable operation.
    </para>

    <para>
      This file is a readable text file, each line of the file describing
      one configuration parameter. The lines consist of a configuration name
      and value, separated by whitespace. Blank lines and comment lines are
      ignored. Comments are introduced with a "#" pound sign and the pound
      sign must be the first non-white character of the line.
    </para>

    <para>
      Parameter values may be of four types: strings, booleans, numbers, and
      long numbers. A string is comprised of any printable characters. A
      boolean should be either the value <replaceable>yes</replaceable> or
      <replaceable>no</replaceable>. An undefined boolean
      parameter or one with a value other than these will be given a
      <replaceable>no</replaceable>
      value. Numbers (both regular and long) may be either decimal values,
      octal values (precede the value with <replaceable>0</replaceable>) or
      hexadecimal values
      (precede the value with <replaceable>0x</replaceable>).
      The maximum value of the regular and
      long numeric parameters is machine-dependent.
    </para>

    <para>The following configuration items are provided:</para>

    <variablelist remap='IP'>
      &CHFN_AUTH;
      &CHFN_RESTRICT;
      &CHSH_AUTH;
      &CONSOLE;
      &CONSOLE_GROUPS;
      &CREATE_HOME;
      &DEFAULT_HOME;
      &ENCRYPT_METHOD;
      &ENV_HZ;
      &ENV_PATH;
      &ENV_SUPATH;
      &ENV_TZ;
      &ENVIRON_FILE;
      &ERASECHAR;
      &FAIL_DELAY;
      &FAILLOG_ENAB;
      &FAKE_SHELL;
      &FTMP_FILE;
      &GID_MAX; <!-- documents also GID_MIN -->
      &HUSHLOGIN_FILE;
      &ISSUE_FILE;
      &KILLCHAR;
      &LASTLOG_ENAB;
      &LOG_OK_LOGINS;
      &LOG_UNKFAIL_ENAB;
      &LOGIN_RETRIES;
      &LOGIN_STRING;
      &LOGIN_TIMEOUT;
      &MAIL_CHECK_ENAB;
      &MAIL_DIR;
      &MAX_MEMBERS_PER_GROUP;
      &MD5_CRYPT_ENAB;
      &MOTD_FILE;
      &NOLOGINS_FILE;
      &OBSCURE_CHECKS_ENAB;
      &PASS_ALWAYS_WARN;
      &PASS_CHANGE_TRIES;
      &PASS_MAX_DAYS;
      &PASS_MIN_DAYS;
      &PASS_WARN_AGE;
      <para> 
        <option>PASS_MAX_DAYS</option>, <option>PASS_MIN_DAYS</option> and
        <option>PASS_WARN_AGE</option> are only used at the
        time of account creation. Any changes to these settings won't affect
        existing accounts.
      </para>
      &PASS_MAX_LEN; <!-- documents also PASS_MIN_LEN -->
      &PORTTIME_CHECKS_ENAB;
      &QUOTAS_ENAB;
      &SHA_CRYPT_MIN_ROUNDS; <!-- documents also SHA_CRYPT_MAX_ROUNDS -->
      &SULOG_FILE;
      &SU_NAME;
      &SU_WHEEL_ONLY;
      &SUB_GID_COUNT; <!-- documents also SUB_GID_MIN SUB_GID_MAX -->
      &SUB_UID_COUNT; <!-- documents also SUB_UID_MIN SUB_UID_MAX -->
      &SYS_GID_MAX; <!-- documents also SYS_GID_MIN -->
      &SYS_UID_MAX; <!-- documents also SYS_UID_MIN -->
      &SYSLOG_SG_ENAB;
      &SYSLOG_SU_ENAB;
      &TCB_AUTH_GROUP;
      &TCB_SYMLINKS;
      &TTYGROUP;
      &TTYTYPE_FILE;
      &UID_MAX; <!-- documents also UID_MIN -->
      &ULIMIT;
      &UMASK;
      &USERDEL_CMD;
      &USERGROUPS_ENAB;
      &USE_TCB;
    </variablelist>
  </refsect1>

  <refsect1 id='cross_references'>
    <title>CROSS REFERENCES</title>
    <para>
      The following cross references show which programs in the shadow
      password suite use which parameters.
    </para>
    <!-- .na -->
    <variablelist remap='IP'>
      <varlistentry condition="tcb">
	<term>chage</term>
	<listitem>
	  <para>USE_TCB</para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>chfn</term>
	<listitem>
	  <para>
	    <phrase condition="no_pam">CHFN_AUTH</phrase>
	    CHFN_RESTRICT
	    <phrase condition="no_pam">LOGIN_STRING</phrase>
	  </para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>chgpasswd</term>
	<listitem>
	  <para>
	    ENCRYPT_METHOD MAX_MEMBERS_PER_GROUP MD5_CRYPT_ENAB
	    <phrase condition="sha_crypt">SHA_CRYPT_MAX_ROUNDS
	    SHA_CRYPT_MIN_ROUNDS</phrase>
	  </para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>chpasswd</term>
	<listitem>
	  <para>
	    <phrase condition="no_pam">ENCRYPT_METHOD
	    MD5_CRYPT_ENAB </phrase>
	    <phrase condition="sha_crypt">SHA_CRYPT_MAX_ROUNDS
	    SHA_CRYPT_MIN_ROUNDS</phrase>
	  </para>
	</listitem>
      </varlistentry>
      <varlistentry condition="no_pam">
	<term>chsh</term>
	<listitem>
	  <para>
	    CHSH_AUTH LOGIN_STRING
	  </para>
	</listitem>
      </varlistentry>
      <!-- expiry: no variables (CONSOLE_GROUPS linked, but not used) -->
      <!-- faillog: no variables -->
      <varlistentry>
	<term>gpasswd</term>
	<listitem>
	  <para>
	    ENCRYPT_METHOD MAX_MEMBERS_PER_GROUP MD5_CRYPT_ENAB
	    <phrase condition="sha_crypt">SHA_CRYPT_MAX_ROUNDS
	    SHA_CRYPT_MIN_ROUNDS</phrase>
	  </para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>groupadd</term>
	<listitem>
	  <para>
	    GID_MAX GID_MIN MAX_MEMBERS_PER_GROUP
	    SYS_GID_MAX SYS_GID_MIN
	  </para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>groupdel</term>
	<listitem>
	  <para>MAX_MEMBERS_PER_GROUP</para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>groupmems</term>
	<listitem>
	  <para>MAX_MEMBERS_PER_GROUP</para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>groupmod</term>
	<listitem>
	  <para>MAX_MEMBERS_PER_GROUP</para>
	</listitem>
      </varlistentry>
      <!-- groups: no variables -->
      <varlistentry>
	<term>grpck</term>
	<listitem>
	  <para>MAX_MEMBERS_PER_GROUP</para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>grpconv</term>
	<listitem>
	  <para>MAX_MEMBERS_PER_GROUP</para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>grpunconv</term>
	<listitem>
	  <para>MAX_MEMBERS_PER_GROUP</para>
	</listitem>
      </varlistentry>
      <!-- id: no variables -->
      <!-- lastlog: no variables -->
      <varlistentry>
	<term>login</term>
	<listitem>
	  <para>
	    <phrase condition="no_pam">CONSOLE</phrase>
	    CONSOLE_GROUPS DEFAULT_HOME
	    <phrase condition="no_pam">ENV_HZ ENV_PATH ENV_SUPATH
	    ENV_TZ ENVIRON_FILE</phrase>
	    ERASECHAR FAIL_DELAY
	    <phrase condition="no_pam">FAILLOG_ENAB</phrase>
	    FAKE_SHELL
	    <phrase condition="no_pam">FTMP_FILE</phrase>
	    HUSHLOGIN_FILE
	    <phrase condition="no_pam">ISSUE_FILE</phrase>
	    KILLCHAR
	    <phrase condition="no_pam">LASTLOG_ENAB</phrase>
	    LOGIN_RETRIES
	    <phrase condition="no_pam">LOGIN_STRING</phrase>
	    LOGIN_TIMEOUT LOG_OK_LOGINS LOG_UNKFAIL_ENAB
	    <phrase condition="no_pam">MAIL_CHECK_ENAB MAIL_DIR MAIL_FILE
	    MOTD_FILE NOLOGINS_FILE PORTTIME_CHECKS_ENAB
	    QUOTAS_ENAB</phrase>
	    TTYGROUP TTYPERM TTYTYPE_FILE
	    <phrase condition="no_pam">ULIMIT UMASK</phrase>
	    USERGROUPS_ENAB
	  </para>
	</listitem>
      </varlistentry>
      <!-- logoutd: no variables -->
      <varlistentry>
	<term>newgrp / sg</term>
	<listitem>
	  <para>
	    SYSLOG_SG_ENAB
	  </para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>newusers</term>
	<listitem>
	  <para>
	    ENCRYPT_METHOD
	    GID_MAX GID_MIN
	    MAX_MEMBERS_PER_GROUP MD5_CRYPT_ENAB
	    PASS_MAX_DAYS PASS_MIN_DAYS PASS_WARN_AGE
	    <phrase condition="sha_crypt">SHA_CRYPT_MAX_ROUNDS
	    SHA_CRYPT_MIN_ROUNDS</phrase>
	    SUB_GID_COUNT SUB_GID_MAX SUB_GID_MIN
	    SUB_UID_COUNT SUB_UID_MAX SUB_UID_MIN
	    SYS_GID_MAX SYS_GID_MIN SYS_UID_MAX SYS_UID_MIN UID_MAX UID_MIN
	    UMASK
	  </para>
	</listitem>
      </varlistentry>
      <!-- nologin: no variables -->
      <varlistentry condition="no_pam">
	<term>passwd</term>
	<listitem>
	  <para>
	    ENCRYPT_METHOD MD5_CRYPT_ENAB OBSCURE_CHECKS_ENAB
	    PASS_ALWAYS_WARN PASS_CHANGE_TRIES PASS_MAX_LEN PASS_MIN_LEN
	    <phrase condition="sha_crypt">SHA_CRYPT_MAX_ROUNDS
	    SHA_CRYPT_MIN_ROUNDS</phrase>
	  </para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>pwck</term>
	<listitem>
	  <para>
	    PASS_MAX_DAYS PASS_MIN_DAYS PASS_WARN_AGE
	    <phrase condition="tcb">TCB_AUTH_GROUP TCB_SYMLINKS USE_TCB</phrase>
	  </para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>pwconv</term>
	<listitem>
	  <para>
	    PASS_MAX_DAYS PASS_MIN_DAYS PASS_WARN_AGE
	    <phrase condition="tcb">USE_TCB</phrase>
	  </para>
	</listitem>
      </varlistentry>
      <varlistentry condition="tcb">
	<term>pwunconv</term>
	<listitem>
	  <para>
	    <phrase condition="tcb">USE_TCB</phrase>
	  </para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>su</term>
	<listitem>
	  <para>
	    <phrase condition="no_pam">CONSOLE</phrase>
	    CONSOLE_GROUPS DEFAULT_HOME
	    <phrase condition="no_pam">ENV_HZ ENVIRON_FILE</phrase>
	    ENV_PATH ENV_SUPATH
	    <phrase condition="no_pam">ENV_TZ LOGIN_STRING MAIL_CHECK_ENAB
	    MAIL_DIR MAIL_FILE QUOTAS_ENAB</phrase>
	    SULOG_FILE SU_NAME
	    <phrase condition="no_pam">SU_WHEEL_ONLY</phrase>
	    SYSLOG_SU_ENAB
	    <phrase condition="no_pam">USERGROUPS_ENAB</phrase>
	  </para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>sulogin</term>
	<listitem>
	  <para>
	    ENV_HZ
	    <phrase condition="no_pam">ENV_TZ</phrase>
	  </para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>useradd</term>
	<listitem>
	  <para>
	    CREATE_HOME
	    GID_MAX GID_MIN
	    MAIL_DIR MAX_MEMBERS_PER_GROUP
	    PASS_MAX_DAYS PASS_MIN_DAYS PASS_WARN_AGE
	    SUB_GID_COUNT SUB_GID_MAX SUB_GID_MIN
	    SUB_UID_COUNT SUB_UID_MAX SUB_UID_MIN
	    SYS_GID_MAX SYS_GID_MIN SYS_UID_MAX SYS_UID_MIN UID_MAX UID_MIN
	    UMASK
	    <phrase condition="tcb">TCB_AUTH_GROUP TCB_SYMLINK USE_TCB</phrase>
	  </para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>userdel</term>
	<listitem>
	  <para>
	    MAIL_DIR MAIL_FILE MAX_MEMBERS_PER_GROUP USERDEL_CMD
	    USERGROUPS_ENAB
	    <phrase condition="tcb">TCB_SYMLINKS USE_TCB</phrase>
	  </para>
	</listitem>
      </varlistentry>
      <varlistentry>
	<term>usermod</term>
	<listitem>
	  <para>
	    MAIL_DIR MAIL_FILE MAX_MEMBERS_PER_GROUP
	    <phrase condition="tcb">TCB_SYMLINKS USE_TCB</phrase>
	  </para>
	</listitem>
      </varlistentry>
      <varlistentry condition="tcb">
	<term>vipw</term>
	<listitem>
	  <para>
	    <phrase condition="tcb">USE_TCB</phrase>
	  </para>
	</listitem>
      </varlistentry>
    </variablelist>
  </refsect1>

  <refsect1 id='bugs' condition="pam">
    <title>BUGS</title>
    <para>
      Much of the functionality that used to be provided by the shadow
      password suite is now handled by PAM. Thus,
      <filename>/etc/login.defs</filename> is no longer used by <citerefentry>
      <refentrytitle>passwd</refentrytitle><manvolnum>1</manvolnum>
      </citerefentry>, or less used by <citerefentry>
      <refentrytitle>login</refentrytitle><manvolnum>1</manvolnum>
      </citerefentry>, and <citerefentry>
      <refentrytitle>su</refentrytitle><manvolnum>1</manvolnum>
      </citerefentry>. Please refer to the corresponding PAM configuration
      files instead.
    </para>
  </refsect1>

  <refsect1 id='see_also'>
    <title>SEE ALSO</title>
    <para>
      <citerefentry>
	<refentrytitle>login</refentrytitle><manvolnum>1</manvolnum>
      </citerefentry>,
      <citerefentry>
	<refentrytitle>passwd</refentrytitle><manvolnum>1</manvolnum>
      </citerefentry>,
      <citerefentry>
	<refentrytitle>su</refentrytitle><manvolnum>1</manvolnum>
      </citerefentry>,
      <citerefentry>
	<refentrytitle>passwd</refentrytitle><manvolnum>5</manvolnum>
      </citerefentry>,
      <citerefentry>
	<refentrytitle>shadow</refentrytitle><manvolnum>5</manvolnum>
      </citerefentry>,
      <citerefentry>
	<refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum>
      </citerefentry>.
    </para>
  </refsect1>
</refentry>
