mirror of
https://github.com/Zeckmathederg/glfs.git
synced 2025-01-25 07:42:13 +08:00
633 lines
22 KiB
XML
633 lines
22 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
|
|
<!ENTITY % general-entities SYSTEM "../../general.ent">
|
|
%general-entities;
|
|
|
|
<!ENTITY shadow-download-http "https://github.com/shadow-maint/shadow/releases/download/&shadow-version;/shadow-&shadow-version;.tar.xz">
|
|
<!ENTITY shadow-download-ftp " ">
|
|
<!ENTITY shadow-md5sum "d957ddf8f56bf695aeb03aa1ca702091">
|
|
<!ENTITY shadow-size "1.7 MB">
|
|
<!ENTITY shadow-buildsize "39 MB">
|
|
<!ENTITY shadow-time "0.2 SBU">
|
|
]>
|
|
|
|
<sect1 id="shadow" xreflabel="Shadow-&shadow-version;">
|
|
<?dbhtml filename="shadow.html"?>
|
|
|
|
|
|
<title>Shadow-&shadow-version;</title>
|
|
|
|
<indexterm zone="shadow">
|
|
<primary sortas="a-Shadow">Shadow</primary>
|
|
</indexterm>
|
|
|
|
<sect2 role="package">
|
|
<title>Introduction to Shadow</title>
|
|
|
|
<para>
|
|
<application>Shadow</application> was indeed installed in LFS and there is
|
|
no reason to reinstall it unless you installed
|
|
<application>CrackLib</application> or
|
|
<application>Linux-PAM</application> after your LFS system was completed.
|
|
If you have installed <application>CrackLib</application> after LFS, then
|
|
reinstalling <application>Shadow</application> will enable strong password
|
|
support. If you have installed <application>Linux-PAM</application>,
|
|
reinstalling <application>Shadow</application> will allow programs such as
|
|
<command>login</command> and <command>su</command> to utilize PAM.
|
|
</para>
|
|
|
|
&lfs121_checked;
|
|
|
|
<bridgehead renderas="sect3">Package Information</bridgehead>
|
|
<itemizedlist spacing="compact">
|
|
<listitem>
|
|
<para>
|
|
Download (HTTP): <ulink url="&shadow-download-http;"/>
|
|
</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>
|
|
Download (FTP): <ulink url="&shadow-download-ftp;"/>
|
|
</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>
|
|
Download MD5 sum: &shadow-md5sum;
|
|
</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>
|
|
Download size: &shadow-size;
|
|
</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>
|
|
Estimated disk space required: &shadow-buildsize;
|
|
</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>
|
|
Estimated build time: &shadow-time;
|
|
</para>
|
|
</listitem>
|
|
</itemizedlist>
|
|
<!--
|
|
<bridgehead renderas="sect3">Additional Downloads</bridgehead>
|
|
<itemizedlist spacing="compact">
|
|
<listitem>
|
|
<para>
|
|
Required patch:
|
|
<ulink url="&patch-root;/shadow-&shadow-version;-useradd_segfault-1.patch"/>
|
|
</para>
|
|
</listitem>
|
|
</itemizedlist>
|
|
-->
|
|
<bridgehead renderas="sect3">Shadow Dependencies</bridgehead>
|
|
|
|
<bridgehead renderas="sect4">Required</bridgehead>
|
|
<para role="required">
|
|
<xref linkend="linux-pam"/> or
|
|
<xref role="nodep" linkend="cracklib"/>
|
|
</para>
|
|
|
|
<bridgehead renderas="sect4">Optional</bridgehead>
|
|
<para role="optional">
|
|
<ulink url="https://libbsd.freedesktop.org/wiki/">libbsd</ulink> and
|
|
<ulink url="https://www.openwall.com/tcb/">tcb</ulink>
|
|
</para>
|
|
|
|
</sect2>
|
|
|
|
<sect2 role="installation">
|
|
<title>Installation of Shadow</title>
|
|
|
|
<important>
|
|
<para>
|
|
The installation commands shown below are for installations where
|
|
<application>Linux-PAM</application> has been installed and
|
|
<application>Shadow</application> is being reinstalled to support the
|
|
<application>Linux-PAM</application> installation.
|
|
</para>
|
|
|
|
<para>
|
|
If you are reinstalling <application>Shadow</application> to provide
|
|
strong password support using the <application>CrackLib</application>
|
|
library without using <application>Linux-PAM</application>, ensure you
|
|
add the <parameter>--with-libcrack</parameter> parameter to the
|
|
<command>configure</command> script below and also issue the following
|
|
command:
|
|
</para>
|
|
|
|
<screen role="nodump"><userinput>sed -i 's@DICTPATH.*@DICTPATH\t/lib/cracklib/pw_dict@' etc/login.defs</userinput></screen>
|
|
</important>
|
|
|
|
<warning>
|
|
<para>
|
|
If reinstalling shadow for a version update, be sure to
|
|
reaccomplish the Linux-PAM configuration below. The installation
|
|
of shadow overwrites many of the files in
|
|
<filename class="directory">/etc/pam.d/</filename>.
|
|
</para>
|
|
</warning>
|
|
|
|
<para>
|
|
Reinstall <application>Shadow</application> by running the following
|
|
commands:
|
|
</para>
|
|
<!--
|
|
<screen><userinput>patch -Np1 -i ../shadow-4.10-useradd_segfault-1.patch &&
|
|
-->
|
|
<screen><userinput>sed -i 's/groups$(EXEEXT) //' src/Makefile.in &&
|
|
|
|
find man -name Makefile.in -exec sed -i 's/groups\.1 / /' {} \; &&
|
|
find man -name Makefile.in -exec sed -i 's/getspnam\.3 / /' {} \; &&
|
|
find man -name Makefile.in -exec sed -i 's/passwd\.5 / /' {} \; &&
|
|
|
|
sed -e 's@#ENCRYPT_METHOD DES@ENCRYPT_METHOD YESCRYPT@' \
|
|
-e 's@/var/spool/mail@/var/mail@' \
|
|
-e '/PATH=/{s@/sbin:@@;s@/bin:@@}' \
|
|
-i etc/login.defs &&
|
|
|
|
./configure --sysconfdir=/etc \
|
|
--disable-static \
|
|
--without-libbsd \
|
|
--with-{b,yes}crypt &&<!--
|
|
This is the default: - -with-group-name-max-length=32 &&-->
|
|
make</userinput></screen>
|
|
|
|
<para>
|
|
This package does not come with a test suite.
|
|
</para>
|
|
|
|
<para>
|
|
Now, as the <systemitem class="username">root</systemitem> user:
|
|
</para>
|
|
|
|
<screen role="root"><userinput>make exec_prefix=/usr pamddir= install</userinput></screen>
|
|
|
|
<para>
|
|
The man pages were installed in LFS, but if reinstallation is
|
|
desired, run (as the <systemitem class="username">root</systemitem> user):
|
|
</para>
|
|
|
|
<screen role="root"><userinput>make -C man install-man</userinput></screen>
|
|
|
|
</sect2>
|
|
|
|
<sect2 role="commands">
|
|
<title>Command Explanations</title>
|
|
|
|
<para>
|
|
<command>sed -i 's/groups$(EXEEXT) //' src/Makefile.in</command>: This sed
|
|
is used to suppress the installation of the <command>groups</command>
|
|
program as the version from the <application>Coreutils</application>
|
|
package installed during LFS is preferred.
|
|
</para>
|
|
|
|
<para>
|
|
<command>find man -name Makefile.in -exec ... {} \;</command>: The
|
|
first command is used to suppress the installation of the
|
|
<command>groups</command> man pages so the existing ones installed from
|
|
the <application>Coreutils</application> package are not replaced.
|
|
The two other commands prevent installation of manual pages that
|
|
are already installed by <application>Man-pages</application> in LFS.
|
|
</para>
|
|
|
|
<para>
|
|
<command>sed -e 's@#ENCRYPT_METHOD DES@ENCRYPT_METHOD YESCRYPT@' -e
|
|
's@/var/spool/mail@/var/mail@' -e '/PATH=/{s@/sbin:@@;s@/bin:@@}'
|
|
-i etc/login.defs</command>: Instead of using the default 'DES'
|
|
method, this command modifies the installation to use the much more
|
|
secure 'YESCRYPT' method of hashing passwords, which also allows
|
|
passwords longer than eight characters. The command also changes the
|
|
obsolete <filename class="directory">/var/spool/mail</filename> location
|
|
for user mailboxes that <application>Shadow</application> uses by
|
|
default to the <filename class="directory">/var/mail</filename>
|
|
location. It also changes the default path to be consistent with that
|
|
set in LFS.
|
|
</para>
|
|
|
|
<para>
|
|
<parameter>--without-libbsd</parameter>: Prevents looking for the
|
|
<command>readpassphrase</command> function, which can be found only in
|
|
<filename class="libraryfile">libbsd</filename>, which we do not
|
|
have in BLFS. An internal implementation of
|
|
<command>readpassphrase</command> is used instead.
|
|
</para>
|
|
|
|
<para>
|
|
<parameter>pamddir=</parameter>: Prevents installation of the shipped
|
|
PAM configuration files into
|
|
<filename class='directory'>/etc/pam.d</filename>. The shipped
|
|
configuration does not work with the BLFS PAM configuration and we
|
|
will create these configuration files explicitly.
|
|
</para>
|
|
|
|
<!-- This is the default
|
|
<para>
|
|
<parameter>-\-with-group-name-max-length=32</parameter>: The maximum
|
|
user name is 32 characters. Make the maximum group name the same.
|
|
</para>
|
|
-->
|
|
<!--
|
|
<para>
|
|
<parameter>-\-without-su</parameter>: Don't reinstall
|
|
<command>su</command> because upstream recommends using the
|
|
<command>su</command> command from <xref linkend='util-linux'/>
|
|
when <application>Linux-PAM</application> is available.
|
|
</para>
|
|
-->
|
|
</sect2>
|
|
|
|
<!-- Now, /etc/default/useradd is not reinstalled anymore, and this
|
|
configuration has been done in lfs
|
|
<sect2 role="configuration">
|
|
<title>Configuring Shadow</title>
|
|
|
|
<para>
|
|
<application>Shadow</application>'s stock configuration for the
|
|
<command>useradd</command> utility may not be desirable for your
|
|
installation. One default parameter causes <command>useradd</command> to
|
|
create a mailbox file for any newly created user.
|
|
<command>useradd</command> will make the group ownership of this file to
|
|
the <systemitem class="groupname">mail</systemitem> group with 0660
|
|
permissions. If you would prefer that these mailbox files are not created
|
|
by <command>useradd</command>, issue the following command as the
|
|
<systemitem class="username">root</systemitem> user:
|
|
</para>
|
|
|
|
<screen role="root"><userinput>sed -i 's/yes/no/' /etc/default/useradd</userinput></screen>
|
|
</sect2>
|
|
-->
|
|
<sect2 role="configuration">
|
|
<title>Configuring Linux-PAM to Work with Shadow</title>
|
|
|
|
<note>
|
|
<para>
|
|
The rest of this page is devoted to configuring
|
|
<application>Shadow</application> to work properly with
|
|
<application>Linux-PAM</application>. If you do not have
|
|
<application>Linux-PAM</application> installed, and you reinstalled
|
|
<application>Shadow</application> to support strong passwords via the
|
|
<application>CrackLib</application> library, no further configuration is
|
|
required.
|
|
</para>
|
|
</note>
|
|
|
|
<sect3 id="pam.d">
|
|
<title>Config Files</title>
|
|
|
|
<para>
|
|
<filename>/etc/pam.d/*</filename> or alternatively
|
|
<filename>/etc/pam.conf</filename>,
|
|
<filename>/etc/login.defs</filename> and
|
|
<filename>/etc/security/*</filename>
|
|
</para>
|
|
|
|
<indexterm zone="shadow pam.d">
|
|
<primary sortas="e-etc-pam.d">/etc/pam.d/*</primary>
|
|
</indexterm>
|
|
|
|
<indexterm zone="shadow pam.d">
|
|
<primary sortas="e-etc-pam.conf">/etc/pam.conf</primary>
|
|
</indexterm>
|
|
|
|
<indexterm zone="shadow pam.d">
|
|
<primary sortas="e-etc-login.defs">/etc/login.defs</primary>
|
|
</indexterm>
|
|
|
|
<indexterm zone="shadow pam.d">
|
|
<primary sortas="e-etc-security">/etc/security/*</primary>
|
|
</indexterm>
|
|
</sect3>
|
|
|
|
<sect3>
|
|
<title>Configuration Information</title>
|
|
|
|
<para>
|
|
Configuring your system to use <application>Linux-PAM</application> can
|
|
be a complex task. The information below will provide a basic setup so
|
|
that <application>Shadow</application>'s login and password
|
|
functionality will work effectively with
|
|
<application>Linux-PAM</application>. Review the information and links
|
|
on the <xref linkend="linux-pam"/> page for further configuration
|
|
information. For information specific to integrating
|
|
<application>Shadow</application>, <application>Linux-PAM</application>
|
|
and <application>libpwquality</application>, you can visit the
|
|
following link:
|
|
</para>
|
|
|
|
<itemizedlist spacing="compact">
|
|
<listitem>
|
|
<!-- Old URL redirects to here. -->
|
|
<para>
|
|
<ulink url="https://deer-run.com/users/hal/linux_passwords_pam.html"/>
|
|
</para>
|
|
</listitem>
|
|
</itemizedlist>
|
|
|
|
<sect4 id="pam-login-defs">
|
|
<title>Configuring /etc/login.defs</title>
|
|
|
|
<para>
|
|
The <command>login</command> program currently performs many functions
|
|
which <application>Linux-PAM</application> modules should now handle.
|
|
The following <command>sed</command> command will comment out the
|
|
appropriate lines in <filename>/etc/login.defs</filename>, and stop
|
|
<command>login</command> from performing these functions (a backup
|
|
file named <filename>/etc/login.defs.orig</filename> is also created
|
|
to preserve the original file's contents). Issue the following
|
|
commands as the <systemitem class="username">root</systemitem> user:
|
|
</para>
|
|
|
|
<indexterm zone="shadow pam-login-defs">
|
|
<primary sortas="e-etc-login.defs">/etc/login.defs</primary>
|
|
</indexterm>
|
|
|
|
<screen role="root"><userinput>install -v -m644 /etc/login.defs /etc/login.defs.orig &&
|
|
for FUNCTION in FAIL_DELAY \
|
|
FAILLOG_ENAB \
|
|
LASTLOG_ENAB \
|
|
MAIL_CHECK_ENAB \
|
|
OBSCURE_CHECKS_ENAB \
|
|
PORTTIME_CHECKS_ENAB \
|
|
QUOTAS_ENAB \
|
|
CONSOLE MOTD_FILE \
|
|
FTMP_FILE NOLOGINS_FILE \
|
|
ENV_HZ PASS_MIN_LEN \
|
|
SU_WHEEL_ONLY \
|
|
CRACKLIB_DICTPATH \
|
|
PASS_CHANGE_TRIES \
|
|
PASS_ALWAYS_WARN \
|
|
CHFN_AUTH ENCRYPT_METHOD \
|
|
ENVIRON_FILE
|
|
do
|
|
sed -i "s/^${FUNCTION}/# &/" /etc/login.defs
|
|
done</userinput></screen>
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>Configuring the /etc/pam.d/ Files</title>
|
|
|
|
<para>
|
|
As mentioned previously in the <application>Linux-PAM</application>
|
|
instructions, <application>Linux-PAM</application> has two supported
|
|
methods for configuration. The commands below assume that you've
|
|
chosen to use a directory based configuration, where each program has
|
|
its own configuration file. You can optionally use a single
|
|
<filename>/etc/pam.conf</filename> configuration file by using the
|
|
text from the files below, and supplying the program name as an
|
|
additional first field for each line.
|
|
</para>
|
|
|
|
<para>
|
|
As the <systemitem class="username">root</systemitem> user, create
|
|
the following <application>Linux-PAM</application> configuration files
|
|
in the <filename class="directory">/etc/pam.d/</filename> directory
|
|
(or add the contents to the <filename>/etc/pam.conf</filename> file)
|
|
using the following commands:
|
|
</para>
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>'login'</title>
|
|
|
|
<screen role="root"><userinput>cat > /etc/pam.d/login << "EOF"
|
|
<literal># Begin /etc/pam.d/login
|
|
|
|
# Set failure delay before next prompt to 3 seconds
|
|
auth optional pam_faildelay.so delay=3000000
|
|
|
|
# Check to make sure that the user is allowed to login
|
|
auth requisite pam_nologin.so
|
|
|
|
# Check to make sure that root is allowed to login
|
|
# Disabled by default. You will need to create /etc/securetty
|
|
# file for this module to function. See man 5 securetty.
|
|
#auth required pam_securetty.so
|
|
|
|
# Additional group memberships - disabled by default
|
|
#auth optional pam_group.so
|
|
|
|
# include system auth settings
|
|
auth include system-auth
|
|
|
|
# check access for the user
|
|
account required pam_access.so
|
|
|
|
# include system account settings
|
|
account include system-account
|
|
|
|
# Set default environment variables for the user
|
|
session required pam_env.so
|
|
|
|
# Set resource limits for the user
|
|
session required pam_limits.so
|
|
|
|
# Display the message of the day - Disabled by default
|
|
#session optional pam_motd.so
|
|
|
|
# Check user's mail - Disabled by default
|
|
#session optional pam_mail.so standard quiet
|
|
|
|
# include system session and password settings
|
|
session include system-session
|
|
password include system-password
|
|
|
|
# End /etc/pam.d/login</literal>
|
|
EOF</userinput></screen>
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>'passwd'</title>
|
|
|
|
<screen role="root"><userinput>cat > /etc/pam.d/passwd << "EOF"
|
|
<literal># Begin /etc/pam.d/passwd
|
|
|
|
password include system-password
|
|
|
|
# End /etc/pam.d/passwd</literal>
|
|
EOF</userinput></screen>
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>'su'</title>
|
|
|
|
<screen role="root"><userinput>cat > /etc/pam.d/su << "EOF"
|
|
<literal># Begin /etc/pam.d/su
|
|
|
|
# always allow root
|
|
auth sufficient pam_rootok.so
|
|
|
|
# Allow users in the wheel group to execute su without a password
|
|
# disabled by default
|
|
#auth sufficient pam_wheel.so trust use_uid
|
|
|
|
# include system auth settings
|
|
auth include system-auth
|
|
|
|
# limit su to users in the wheel group
|
|
# disabled by default
|
|
#auth required pam_wheel.so use_uid
|
|
|
|
# include system account settings
|
|
account include system-account
|
|
|
|
# Set default environment variables for the service user
|
|
session required pam_env.so
|
|
|
|
# include system session settings
|
|
session include system-session
|
|
|
|
# End /etc/pam.d/su</literal>
|
|
EOF</userinput></screen>
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>'chpasswd' and 'newusers'</title>
|
|
|
|
<screen role="root"><userinput>cat > /etc/pam.d/chpasswd << "EOF"
|
|
<literal># Begin /etc/pam.d/chpasswd
|
|
|
|
# always allow root
|
|
auth sufficient pam_rootok.so
|
|
|
|
# include system auth and account settings
|
|
auth include system-auth
|
|
account include system-account
|
|
password include system-password
|
|
|
|
# End /etc/pam.d/chpasswd</literal>
|
|
EOF
|
|
|
|
sed -e s/chpasswd/newusers/ /etc/pam.d/chpasswd >/etc/pam.d/newusers</userinput></screen>
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>'chage'</title>
|
|
|
|
<screen role="root"><userinput>cat > /etc/pam.d/chage << "EOF"
|
|
<literal># Begin /etc/pam.d/chage
|
|
|
|
# always allow root
|
|
auth sufficient pam_rootok.so
|
|
|
|
# include system auth and account settings
|
|
auth include system-auth
|
|
account include system-account
|
|
|
|
# End /etc/pam.d/chage</literal>
|
|
EOF</userinput></screen>
|
|
</sect4>
|
|
|
|
<sect4>
|
|
<title>Other shadow utilities</title>
|
|
|
|
<screen role="root"><userinput>for PROGRAM in chfn chgpasswd chsh groupadd groupdel \
|
|
groupmems groupmod useradd userdel usermod
|
|
do
|
|
install -v -m644 /etc/pam.d/chage /etc/pam.d/${PROGRAM}
|
|
sed -i "s/chage/$PROGRAM/" /etc/pam.d/${PROGRAM}
|
|
done</userinput></screen>
|
|
|
|
<warning>
|
|
<para>
|
|
At this point, you should do a simple test to see if
|
|
<application>Shadow</application> is working as expected. Open
|
|
another terminal and log in as
|
|
<systemitem class="username">root</systemitem>, and then run
|
|
<command>login</command> and login as another user. If you do
|
|
not see any errors, then all is well and you should proceed with
|
|
the rest of the configuration. If you did receive errors, stop
|
|
now and double check the above configuration files manually.
|
|
Any error is the sign of an error in the above procedure.
|
|
You can also run the
|
|
test suite from the <application>Linux-PAM</application> package
|
|
to assist you in determining the problem. If you cannot find and
|
|
fix the error, you should recompile
|
|
<application>Shadow</application> adding the
|
|
<option>--without-libpam</option> switch to the
|
|
<command>configure</command> command in the above instructions
|
|
(also move the <filename>/etc/login.defs.orig</filename> backup
|
|
file to <filename>/etc/login.defs</filename>). If you fail to do
|
|
this and the errors remain, you will be unable to log into your
|
|
system.
|
|
</para>
|
|
</warning>
|
|
</sect4>
|
|
|
|
<sect4 id="pam-access">
|
|
<title>Configuring Login Access</title>
|
|
|
|
<para>
|
|
Instead of using the <filename>/etc/login.access</filename> file for
|
|
controlling access to the system, <application>Linux-PAM</application>
|
|
uses the <filename class='libraryfile'>pam_access.so</filename> module
|
|
along with the <filename>/etc/security/access.conf</filename> file.
|
|
Rename the <filename>/etc/login.access</filename> file using the
|
|
following command:
|
|
</para>
|
|
|
|
<indexterm zone="shadow pam-access">
|
|
<primary sortas="e-etc-security-access.conf">/etc/security/access.conf</primary>
|
|
</indexterm>
|
|
<!-- to editors: it is a common belief that:
|
|
if <condition>; then <command>; fi
|
|
is equivalent to:
|
|
<condition> && <command>
|
|
This is not true in bash; try:
|
|
([ 0 = 1 ] && echo not reachable); echo $? # echoes 1
|
|
vs
|
|
(if [ 0 = 1 ]; then echo not reachable; fi); echo $? # echoes 0
|
|
So in scripts that may call subshells (for example through sudo) and
|
|
that need error reporting, the outcome _is_ different. In all
|
|
cases, for bash, the "if" form should be preferred.-->
|
|
<screen role="root"><userinput>if [ -f /etc/login.access ]; then mv -v /etc/login.access{,.NOUSE}; fi</userinput></screen>
|
|
</sect4>
|
|
|
|
<sect4 id="pam-limits">
|
|
<title>Configuring Resource Limits</title>
|
|
|
|
<para>
|
|
Instead of using the <filename>/etc/limits</filename> file for
|
|
limiting usage of system resources,
|
|
<application>Linux-PAM</application> uses the
|
|
<filename class='libraryfile'>pam_limits.so</filename> module along
|
|
with the <filename>/etc/security/limits.conf</filename> file. Rename
|
|
the <filename>/etc/limits</filename> file using the following command:
|
|
</para>
|
|
|
|
<indexterm zone="shadow pam-limits">
|
|
<primary sortas="e-etc-security-limits.conf">/etc/security/limits.conf</primary>
|
|
</indexterm>
|
|
|
|
<screen role="root"><userinput>if [ -f /etc/limits ]; then mv -v /etc/limits{,.NOUSE}; fi</userinput></screen>
|
|
|
|
<caution>
|
|
<para>
|
|
Be sure to test the login capabilities of the system before logging
|
|
out. Errors in the configuration can cause a permanent
|
|
lockout requiring a boot from an external source to correct the
|
|
problem.
|
|
</para>
|
|
</caution>
|
|
|
|
</sect4>
|
|
</sect3>
|
|
|
|
</sect2>
|
|
|
|
<sect2 role="content">
|
|
<title>Contents</title>
|
|
|
|
<para>
|
|
A list of the installed files, along with their short descriptions can be
|
|
found at
|
|
<ulink url="&lfs-root;/chapter08/shadow.html#contents-shadow"/>.
|
|
</para>
|
|
|
|
</sect2>
|
|
|
|
</sect1>
|