man/systemd-remount-fs.service.xml

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   5   SPDX-License-Identifier: LGPL-2.1+
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   7 <refentry id="systemd-remount-fs.service">
   8
   9   <refentryinfo>
  10     <title>systemd-remount-fs.service</title>
  11     <productname>systemd</productname>
  12   </refentryinfo>
  13
  14   <refmeta>
  15     <refentrytitle>systemd-remount-fs.service</refentrytitle>
  16     <manvolnum>8</manvolnum>
  17   </refmeta>
  18
  19   <refnamediv>
  20     <refname>systemd-remount-fs.service</refname>
  21     <refname>systemd-remount-fs</refname>
  22     <refpurpose>Remount root and kernel file systems</refpurpose>
  23   </refnamediv>
  24
  25   <refsynopsisdiv>
  26     <para><filename>systemd-remount-fs.service</filename></para>
  27     <para><filename>/usr/lib/systemd/systemd-remount-fs</filename></para>
  28   </refsynopsisdiv>
  29
  30   <refsect1>
  31     <title>Description</title>
  32
  33     <para><filename>systemd-remount-fs.service</filename> is an
  34     early boot service that applies mount options listed in
  35     <citerefentry project='man-pages'><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  36     to the root file system, the <filename>/usr</filename> file system,
  37     and the kernel API file systems. This is required so that the
  38     mount options of these file systems — which are pre-mounted by
  39     the kernel, the initial RAM disk, container environments or system
  40     manager code — are updated to those listed in
  41     <filename>/etc/fstab</filename>. This service ignores normal file
  42     systems and only changes the root file system (i.e.
  43     <filename>/</filename>), <filename>/usr</filename> and the virtual
  44     kernel API file systems such as <filename>/proc</filename>,
  45     <filename>/sys</filename> or <filename>/dev</filename>. This
  46     service executes no operation if <filename>/etc/fstab</filename>
  47     does not exist or lists no entries for the mentioned file
  48     systems.</para>
  49
  50     <para>For a longer discussion of kernel API file systems see
  51     <ulink url="https://www.freedesktop.org/wiki/Software/systemd/APIFileSystems">API
  52     File Systems</ulink>.</para>
  53   </refsect1>
  54
  55   <refsect1>
  56     <title>See Also</title>
  57     <para>
  58       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
  59       <citerefentry project='man-pages'><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
  60       <citerefentry project='man-pages'><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
  61     </para>
  62   </refsect1>
  63
  64 </refentry>