man/systemd-remount-fs.service.xml

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   3 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
   4 <!--
   5   SPDX-License-Identifier: LGPL-2.1+
   6
   7   This file is part of systemd.
   8
   9   Copyright 2012 Lennart Poettering
  10 -->
  11 <refentry id="systemd-remount-fs.service">
  12
  13   <refentryinfo>
  14     <title>systemd-remount-fs.service</title>
  15     <productname>systemd</productname>
  16
  17     <authorgroup>
  18       <author>
  19         <contrib>Developer</contrib>
  20         <firstname>Lennart</firstname>
  21         <surname>Poettering</surname>
  22         <email>lennart@poettering.net</email>
  23       </author>
  24     </authorgroup>
  25   </refentryinfo>
  26
  27   <refmeta>
  28     <refentrytitle>systemd-remount-fs.service</refentrytitle>
  29     <manvolnum>8</manvolnum>
  30   </refmeta>
  31
  32   <refnamediv>
  33     <refname>systemd-remount-fs.service</refname>
  34     <refname>systemd-remount-fs</refname>
  35     <refpurpose>Remount root and kernel file systems</refpurpose>
  36   </refnamediv>
  37
  38   <refsynopsisdiv>
  39     <para><filename>systemd-remount-fs.service</filename></para>
  40     <para><filename>/usr/lib/systemd/systemd-remount-fs</filename></para>
  41   </refsynopsisdiv>
  42
  43   <refsect1>
  44     <title>Description</title>
  45
  46     <para><filename>systemd-remount-fs.service</filename> is an
  47     early boot service that applies mount options listed in
  48     <citerefentry project='man-pages'><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  49     to the root file system, the <filename>/usr</filename> file system,
  50     and the kernel API file systems. This is required so that the
  51     mount options of these file systems — which are pre-mounted by
  52     the kernel, the initial RAM disk, container environments or system
  53     manager code — are updated to those listed in
  54     <filename>/etc/fstab</filename>. This service ignores normal file
  55     systems and only changes the root file system (i.e.
  56     <filename>/</filename>), <filename>/usr</filename> and the virtual
  57     kernel API file systems such as <filename>/proc</filename>,
  58     <filename>/sys</filename> or <filename>/dev</filename>. This
  59     service executes no operation if <filename>/etc/fstab</filename>
  60     does not exist or lists no entries for the mentioned file
  61     systems.</para>
  62
  63     <para>For a longer discussion of kernel API file systems see
  64     <ulink url="https://www.freedesktop.org/wiki/Software/systemd/APIFileSystems">API
  65     File Systems</ulink>.</para>
  66   </refsect1>
  67
  68   <refsect1>
  69     <title>See Also</title>
  70     <para>
  71       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
  72       <citerefentry project='man-pages'><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
  73       <citerefentry project='man-pages'><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
  74     </para>
  75   </refsect1>
  76
  77 </refentry>