core: introduce new Type=exec service type

[thirdparty/systemd.git] / man / systemd-remount-fs.service.xml

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<refentry id="systemd-remount-fs.service">

  <refentryinfo>
    <title>systemd-remount-fs.service</title>
    <productname>systemd</productname>
  </refentryinfo>

  <refmeta>
    <refentrytitle>systemd-remount-fs.service</refentrytitle>
    <manvolnum>8</manvolnum>
  </refmeta>

  <refnamediv>
    <refname>systemd-remount-fs.service</refname>
    <refname>systemd-remount-fs</refname>
    <refpurpose>Remount root and kernel file systems</refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <para><filename>systemd-remount-fs.service</filename></para>
    <para><filename>/usr/lib/systemd/systemd-remount-fs</filename></para>
  </refsynopsisdiv>

  <refsect1>
    <title>Description</title>

    <para><filename>systemd-remount-fs.service</filename> is an
    early boot service that applies mount options listed in
    <citerefentry project='man-pages'><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>
    to the root file system, the <filename>/usr</filename> file system,
    and the kernel API file systems. This is required so that the
    mount options of these file systems — which are pre-mounted by
    the kernel, the initial RAM disk, container environments or system
    manager code — are updated to those listed in
    <filename>/etc/fstab</filename>. This service ignores normal file
    systems and only changes the root file system (i.e.
    <filename>/</filename>), <filename>/usr</filename> and the virtual
    kernel API file systems such as <filename>/proc</filename>,
    <filename>/sys</filename> or <filename>/dev</filename>. This
    service executes no operation if <filename>/etc/fstab</filename>
    does not exist or lists no entries for the mentioned file
    systems.</para>

    <para>For a longer discussion of kernel API file systems see
    <ulink url="https://www.freedesktop.org/wiki/Software/systemd/APIFileSystems">API
    File Systems</ulink>.</para>
  </refsect1>

  <refsect1>
    <title>See Also</title>
    <para>
      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
      <citerefentry project='man-pages'><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
      <citerefentry project='man-pages'><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
    </para>
  </refsect1>

</refentry>