source: postlfs/config/autofs.xml@ 460c6edb

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
   "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY autofs-patch-dir     "http://ftp.kernel.org/pub/linux/daemons/autofs/v4/">
  <!ENTITY autofs-download-http "http://ftp.kernel.org/pub/linux/daemons/autofs/v4/autofs-&autofs-version;.tar.bz2">
  <!ENTITY autofs-download-ftp "ftp://ftp.kernel.org/pub/linux/daemons/autofs/v4/autofs-&autofs-version;.tar.bz2">
  <!ENTITY autofs-md5sum        "7e3949114c00665b4636f0c318179657">
  <!ENTITY autofs-size          "168 KB">
  <!ENTITY autofs-buildsize     "2.3 MB">
  <!ENTITY autofs-time          "less than 0.1 SBU">
]>

<sect1 id="autofs" xreflabel="autofs-&autofs-version;">
  <?dbhtml filename="autofs.html"?>

  <sect1info>
    <othername>$LastChangedBy$</othername>
    <date>$Date$</date>
  </sect1info>

  <title>Automate Mounting of File Systems</title>

  <indexterm zone="autofs">
    <primary sortas="a-Autofs">Autofs</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to Autofs</title>

    <para>The <application>autofs</application> package contains userspace
    tools that work with the kernel to mount and un-mount removable file
    systems. This is useful for allowing users to mount floppies, cdroms and
    other removable storage devices without requiring the system
    administrator to mount the devices.  This may not be ideal for all
    installations, so be aware of the risks before implementing this feature.</para>

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>Download (HTTP): <ulink url="&autofs-download-http;"/></para>
      </listitem>
      <listitem>
        <para>Download (FTP): <ulink url="&autofs-download-ftp;"/></para>
      </listitem>
      <listitem>
        <para>Download MD5 sum: &autofs-md5sum;</para>
      </listitem>
      <listitem>
        <para>Download size: &autofs-size;</para>
      </listitem>
      <listitem>
        <para>Estimated disk space required: &autofs-buildsize;</para>
      </listitem>
      <listitem>
        <para>Estimated build time: &autofs-time;</para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">Additional Downloads</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>Recommended Patch: <ulink
        url="&autofs-patch-dir;autofs-&autofs-version;-misc-fixes.patch"/></para>
      </listitem>
      <listitem>
        <para>Recommended Patch: <ulink
        url="&autofs-patch-dir;autofs-&autofs-version;-multi-parse-fix.patch"/></para>
      </listitem>
      <listitem>
        <para>Recommended Patch: <ulink
        url="&autofs-patch-dir;autofs-&autofs-version;-non-replicated-ping.patch"/></para>
      </listitem>
    </itemizedlist>

  </sect2>

  <sect2 role="kernel" id="autofs-kernel">
    <title>Kernel Configuration</title>

    <indexterm zone="autofs autofs-kernel">
      <primary sortas="d-Automounter">Automounter</primary>
    </indexterm>

    <para>Verify that kernel support has been compiled in or built as
    modules in the following areas:</para>

<screen><literal>File systems
    Kernel automounter version 4 support        Y or M
Network File Systems
    NFS file system support                     Y or M
    SMB file system support                     Y or M</literal></screen>

    <para>Recompile and install the new kernel, if necessary.</para>

  </sect2>

  <sect2 role="installation">

    <title>Installation of Autofs</title>

    <para>Install <application>autofs</application> by running the following
    commands:</para>

<screen><userinput>patch -Np1 -i ../autofs-&autofs-version;-misc-fixes.patch &amp;&amp;
patch -Np1 -i ../autofs-&autofs-version;-multi-parse-fix.patch &amp;&amp;
patch -Np1 -i ../autofs-&autofs-version;-non-replicated-ping.patch &amp;&amp;
make</userinput></screen>

    <para>Now, as the <systemitem class="username">root</systemitem> user:</para>

<screen role="root"><userinput>make install &amp;&amp;
rm /etc/rc.d/init.d/autofs</userinput></screen>

  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <para><command>rm /etc/rc.d/init.d/autofs</command>: This command
    removes the installed script which only works on specific distributions.</para>

  </sect2>

  <sect2 role="configuration">
    <title>Configuring Autofs</title>

    <sect3 id="autofs-config">
      <title>Config Files</title>

      <para><filename>/etc/sysconfig/autofs.conf</filename>,
      <filename>/etc/auto.master</filename>,
      <filename>/etc/auto.misc</filename>, and
      <filename>/etc/auto.net</filename></para>

      <indexterm zone="autofs autofs-config" >
        <primary sortas="e-etc-sysconfig-autofs.conf">/etc/sysconfig/autofs.conf</primary>
      </indexterm>

      <indexterm zone="autofs autofs-config">
        <primary sortas="e-etc-auto.master">/etc/auto.master</primary>
      </indexterm>

      <indexterm zone="autofs autofs-config">
        <primary sortas="e-etc-auto.misc">/etc/auto.misc</primary>
      </indexterm>

      <indexterm zone="autofs autofs-config">
        <primary sortas="e-etc-auto.net">/etc/auto.net</primary>
      </indexterm>

    </sect3>

    <sect3>
      <title>Configuration Information</title>

      <para>The installation process creates <filename>auto.master</filename>,
      <filename>auto.misc</filename> and <filename>auto.net</filename>. You
      will replace the <filename>auto.master</filename> with the following
      commands:</para>

<screen role="root"><userinput>mv /etc/auto.master /etc/auto.master.bak &amp;&amp;
cat &gt; /etc/auto.master &lt;&lt; "EOF"
<literal># Begin /etc/auto.master

/media  /etc/auto.misc

# End /etc/auto.master</literal>
EOF</userinput></screen>

      <note>
        <para>This file mounts a new media directory over the one created by
        LFS and will therefore hide any mounts made by the
        <filename>fstab</filename> file into that directory.</para>
      </note>

      <para>While this package could be used to mount NFS shares and SMB
      shares, that feature is not configured in these instructions. NFS shares
      are covered on the next page.</para>

      <para>The <filename>auto.misc</filename> must be configured to your
      working hardware. The loaded configuration file should load your cdrom
      if <filename>/dev/cdrom</filename> is active or it can be edited to
      match your device setup and examples for floppies are available in the file
      and easily activated. Documentation for this file is available using the
      <command>man 5 autofs</command> command.</para>

    </sect3>

    <sect3  id="autofs-init">
      <title>Boot Script</title>


      <para>Install the <filename>/etc/rc.d/init.d/autofs</filename> mount script
      and <filename>/etc/sysconfig/autofs.conf</filename> support file included
      with the <xref linkend="intro-important-bootscripts"/> package.</para>

      <indexterm zone="autofs autofs-init">
        <primary sortas="f-autofs-init">autofs</primary>
      </indexterm>

<screen role="root"><userinput>make install-autofs</userinput></screen>

      <para>The time-out variable is set in
      <filename>/etc/sysconfig/autofs.conf</filename>. The installed file sets
      a default of 60 seconds of inactivity before unmounting the device.  A
      much shorter time may be necessary to protect buffer writing to a floppy
      if users tend to remove the media prior to the timeout setting.</para>

    </sect3>

  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Program</segtitle>
      <segtitle>Installed Libraries</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>automount</seg>
        <seg>autofs modules</seg>
        <seg>/lib/autofs and /var/run/autofs</seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="automount">
        <term><command>automount</command></term>
        <listitem>
          <para>is the daemon that performs the mounting when a request is
          made for the device.</para>
          <indexterm zone="autofs automount">
            <primary sortas="b-automount">automount</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>