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[thirdparty/systemd.git] / man / systemd-fstab-generator.xml

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<refentry id="systemd-fstab-generator">

  <refentryinfo>
    <title>systemd-fstab-generator</title>
    <productname>systemd</productname>

    <authorgroup>
      <author>
        <contrib>Developer</contrib>
        <firstname>Lennart</firstname>
        <surname>Poettering</surname>
        <email>lennart@poettering.net</email>
      </author>
    </authorgroup>
  </refentryinfo>

  <refmeta>
    <refentrytitle>systemd-fstab-generator</refentrytitle>
    <manvolnum>8</manvolnum>
  </refmeta>

  <refnamediv>
    <refname>systemd-fstab-generator</refname>
    <refpurpose>Unit generator for /etc/fstab</refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <para><filename>/usr/lib/systemd/system-generators/systemd-fstab-generator</filename></para>
  </refsynopsisdiv>

  <refsect1>
    <title>Description</title>

    <para><filename>systemd-fstab-generator</filename> is a generator
    that translates <filename>/etc/fstab</filename> (see
    <citerefentry><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>
    for details) into native systemd units early at boot and when
    configuration of the system manager is reloaded. This will
    instantiate mount and swap units as necessary.</para>

    <para>The <varname>passno</varname> field is treated like a simple
    boolean, and the ordering information is discarded. However, if
    the root file system is checked, it is checked before all the
    other file systems.</para>

    <para>See
    <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
    and
    <citerefentry><refentrytitle>systemd.swap</refentrytitle><manvolnum>5</manvolnum></citerefentry>
    for more information about special <filename>/etc/fstab</filename>
    mount options this generator understands.</para>

    <para><filename>systemd-fstab-generator</filename> implements the
    <ulink
    url="http://www.freedesktop.org/wiki/Software/systemd/Generators">generator
    specification</ulink>.</para>
  </refsect1>

  <refsect1>
    <title>Kernel Command Line</title>

    <para><filename>systemd-fstab-generator</filename> understands the
    following kernel command line parameters:</para>

    <variablelist class='kernel-commandline-options'>

      <varlistentry>
        <term><varname>fstab=</varname></term>
        <term><varname>rd.fstab=</varname></term>

        <listitem><para>Takes a boolean argument. Defaults to
        <literal>yes</literal>. If <literal>no</literal>, causes the
        generator to ignore any mounts or swaps configured in
        <filename>/etc/fstab</filename>. <varname>rd.fstab=</varname>
        is honored only by initial RAM disk (initrd) while
        <varname>fstab=</varname> is honored by both the main system
        and the initrd.</para></listitem>
      </varlistentry>
      <varlistentry>
        <term><varname>root=</varname></term>

        <listitem><para>Takes the root filesystem to mount in the
        initrd. <varname>root=</varname> is honored by the
        initrd.</para></listitem>
      </varlistentry>
      <varlistentry>
        <term><varname>rootfstype=</varname></term>

        <listitem><para>Takes the root filesystem type that will be
        passed to the mount command. <varname>rootfstype=</varname> is
        honored by the initrd.</para></listitem>
      </varlistentry>
      <varlistentry>
        <term><varname>rootflags=</varname></term>

        <listitem><para>Takes the root filesystem mount options to
        use. <varname>rootflags=</varname> is honored by the
        initrd.</para></listitem>
      </varlistentry>
      <varlistentry>
        <term><varname>mount.usr=</varname></term>

        <listitem><para>Takes the <filename>/usr</filename> filesystem
        to be mounted by the initrd. If
        <varname>mount.usrfstype=</varname> or
        <varname>mount.usrflags=</varname> is set, then
        <varname>mount.usr=</varname> will default to the value set in
        <varname>root=</varname>.</para>

        <para>Otherwise this parameter defaults to the
        <filename>/usr</filename> entry found in
        <filename>/etc/fstab</filename> on the root filesystem.</para>

        <para><varname>mount.usr=</varname> is honored by the initrd.
        </para></listitem>
      </varlistentry>
      <varlistentry>
        <term><varname>mount.usrfstype=</varname></term>

        <listitem><para>Takes the <filename>/usr</filename> filesystem
        type that will be passed to the mount command. If
        <varname>mount.usr=</varname> or
        <varname>mount.usrflags=</varname> is set, then
        <varname>mount.usrfstype=</varname> will default to the value
        set in <varname>rootfstype=</varname>.</para>

        <para>Otherwise this value will be read from the
        <filename>/usr</filename> entry in
        <filename>/etc/fstab</filename> on the root filesystem.</para>

        <para><varname>mount.usrfstype=</varname> is honored by the
        initrd.</para></listitem>
      </varlistentry>
      <varlistentry>
        <term><varname>mount.usrflags=</varname></term>

        <listitem><para>Takes the <filename>/usr</filename> filesystem
        mount options to use. If <varname>mount.usr=</varname> or
        <varname>mount.usrfstype=</varname> is set, then
        <varname>mount.usrflages=</varname> will default to the value
        set in <varname>rootflags=</varname>.</para>

        <para>Otherwise this value will be read from the
        <filename>/usr</filename> entry in
        <filename>/etc/fstab</filename> on the root filesystem.</para>

        <para><varname>mount.usrflags=</varname> is honored by the
        initrd.</para></listitem>
      </varlistentry>
    </variablelist>
  </refsect1>

  <refsect1>
    <title>See Also</title>
    <para>
      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>systemd.swap</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>systemd-cryptsetup-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>
    </para>
  </refsect1>

</refentry>