Renaming the Shadow files to match the package name.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@3228 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

1 files changed, 137 insertions, 0 deletions

diff --git a/chapter06/shadow.xml b/chapter06/shadow.xml
new file mode 100644
index 000000000..69aaf0150
--- /dev/null
+++ b/chapter06/shadow.xml
@@ -0,0 +1,137 @@
+<sect1 id="ch-system-shadow" xreflabel="Shadow">
+<title>Installing Shadow-&shadow-version;</title>
+<?dbhtml filename="shadow.html" dir="chapter06"?>
+
+<para>The Shadow package contains programs for handling passwords in a secure
+way.</para>
+
+<screen>&buildtime; &shadow-time;
+&diskspace; &shadow-compsize;</screen>
+
+&aa-shadow-down;
+&aa-shadow-dep;
+
+<sect2><title>&nbsp;</title><para>&nbsp;</para></sect2>
+
+<sect2>
+<title>Installation of Shadow</title>
+
+<para>Shadow hard-wires the path to the <command>passwd</command> binary
+within the binary itself, but does this the wrong way. If a
+<command>passwd</command> binary is not present before installing Shadow,
+the package incorrectly assumes it is going to be located at
+<filename>/bin/passwd</filename>, but then installs it in
+<filename>/usr/bin/passwd</filename>. This will lead to errors about not finding
+<filename>/bin/passwd</filename>. To work around this bug, create a dummy
+<filename>passwd</filename> file, so that it gets hard-wired properly:</para>
+
+<screen><userinput>touch /usr/bin/passwd</userinput></screen>
+
+<para>Now prepare Shadow for compilation:</para>
+
+<screen><userinput>./configure --libdir=/usr/lib --enable-shared</userinput></screen>
+
+<para>Work around a problem that prevents Shadow's internationalization from
+working:</para>
+
+<screen><userinput>echo '#define HAVE_SETLOCALE 1' >> config.h</userinput></screen>
+
+<para>Compile the package:</para>
+
+<screen><userinput>make</userinput></screen>
+
+<para>And install it:</para>
+
+<screen><userinput>make install</userinput></screen>
+
+<para>Shadow uses two files to configure authentication settings for the
+system. Install these two config files:</para>
+
+<screen><userinput>cp etc/{limits,login.access} /etc</userinput></screen>
+
+<para>We want to change the password method to enable MD5 passwords which are
+theoretically more secure than the default crypt method and also allow
+password lengths greater than 8 characters. We also need to change the old
+<filename class="directory">/var/spool/mail</filename> location for user
+mailboxes to the current location at
+<filename class="directory">/var/mail</filename>. We do this by changing the
+relevant configuration file while copying it to its destination:</para>
+
+<screen><userinput>sed -e 's%/var/spool/mail%/var/mail%' \
+&nbsp;&nbsp;&nbsp;&nbsp;-e 's%#MD5_CRYPT_ENAB.no%MD5_CRYPT_ENAB yes%' \
+&nbsp;&nbsp;&nbsp;&nbsp;etc/login.defs.linux &gt; /etc/login.defs</userinput></screen>
+
+<note><para>Be extra careful when typing all of the above. It is probably safer
+to cut-and-paste it rather than try and type it all in.</para></note>
+
+<para>Move some misplaced symlinks to their proper locations:</para>
+
+<screen><userinput>mv /bin/sg /usr/bin
+mv /bin/vigr /usr/sbin</userinput></screen>
+
+<para>And move Shadow's dynamic libraries to a more appropriate location:</para>
+
+<screen><userinput>mv /usr/lib/lib{shadow,misc}.so.0* /lib</userinput></screen>
+
+<para>As some packages expect to find the just-moved libraries in
+<filename>/usr/lib</filename>, create the following symlinks:</para>
+
+<screen><userinput>ln -sf ../../lib/libshadow.so.0 /usr/lib/libshadow.so
+ln -sf ../../lib/libmisc.so.0 /usr/lib/libmisc.so</userinput></screen>
+
+<para>The -D option of the <filename>useradd</filename> program requires this
+directory for it to work properly:</para>
+
+<screen><userinput>mkdir /etc/default</userinput></screen>
+
+<para>Coreutils has already installed a better <command>groups</command>
+program in <filename>/usr/bin</filename>. Remove the one installed by
+Shadow:</para>
+
+<screen><userinput>rm /bin/groups</userinput></screen>
+
+</sect2>
+
+<sect2><title>&nbsp;</title><para>&nbsp;</para></sect2>
+
+<sect2><title>Configuring Shadow</title>
+
+<para>This package contains utilities to modify users' passwords, add
+or delete users and groups, and the like. We're not going to explain what
+'password shadowing' means. A full explanation can be found in the
+<filename>doc/HOWTO</filename>
+file within the unpacked Shadow source tree. There's one 
+thing to keep in mind if you decide to use Shadow support: programs that
+need to verify passwords (for example xdm, ftp daemons, pop3 daemons) need
+to be 'shadow-compliant', that is they need to be able to work with 
+shadowed passwords.</para>
+
+<para>To enable shadowed passwords, run the following command:</para>
+
+<screen><userinput>/usr/sbin/pwconv</userinput></screen>
+
+<para>And to enable shadowed group passwords, run the following
+command:</para>
+
+<screen><userinput>/usr/sbin/grpconv</userinput></screen>
+
+<para>Under normal circumstances, you won't have created any passwords yet.
+However, if returning to this section to enable shadowing, you should reset any
+current user passwords with the <command>passwd</command> command or any
+group passwords with the <command>gpasswd</command> command.</para>
+</sect2>
+
+<sect2>
+<title>Setting the root password</title>
+
+<para>Choose a password for user root and set it via:</para>
+
+<screen><userinput>passwd root</userinput></screen>
+
+</sect2>
+
+&aa-shadow-shortdesc;
+&aa-shadow-desc;
+
+</sect1>
+