man/systemd-fsck@.service.xml

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   4 <!--
   5   SPDX-License-Identifier: LGPL-2.1+
   6
   7   Copyright 2012 Lennart Poettering
   8 -->
   9 <refentry id="systemd-fsck@.service">
  10
  11   <refentryinfo>
  12     <title>systemd-fsck@.service</title>
  13     <productname>systemd</productname>
  14
  15     <authorgroup>
  16       <author>
  17         <contrib>Developer</contrib>
  18         <firstname>Lennart</firstname>
  19         <surname>Poettering</surname>
  20         <email>lennart@poettering.net</email>
  21       </author>
  22     </authorgroup>
  23   </refentryinfo>
  24
  25   <refmeta>
  26     <refentrytitle>systemd-fsck@.service</refentrytitle>
  27     <manvolnum>8</manvolnum>
  28   </refmeta>
  29
  30   <refnamediv>
  31     <refname>systemd-fsck@.service</refname>
  32     <refname>systemd-fsck-root.service</refname>
  33     <refname>systemd-fsck</refname>
  34     <refpurpose>File system checker logic</refpurpose>
  35   </refnamediv>
  36
  37   <refsynopsisdiv>
  38     <para><filename>systemd-fsck@.service</filename></para>
  39     <para><filename>systemd-fsck-root.service</filename></para>
  40     <para><filename>/usr/lib/systemd/systemd-fsck</filename></para>
  41   </refsynopsisdiv>
  42
  43   <refsect1>
  44     <title>Description</title>
  45
  46     <para><filename>systemd-fsck@.service</filename> and
  47     <filename>systemd-fsck-root.service</filename> are services
  48     responsible for file system checks. They are instantiated for each
  49     device that is configured for file system checking.
  50     <filename>systemd-fsck-root.service</filename> is responsible for
  51     file system checks on the root file system, but only if the
  52     root filesystem was not checked in the initramfs.
  53     <filename>systemd-fsck@.service</filename> is used for all other
  54     file systems and for the root file system in the initramfs.</para>
  55
  56     <para>These services are started at boot if
  57     <option>passno</option> in <filename>/etc/fstab</filename> for the
  58     file system is set to a value greater than zero. The file system
  59     check for root is performed before the other file systems. Other
  60     file systems may be checked in parallel, except when they are on
  61     the same rotating disk.</para>
  62
  63     <para><filename>systemd-fsck</filename> does not know any details
  64     about specific filesystems, and simply executes file system
  65     checkers specific to each filesystem type
  66     (<filename>/sbin/fsck.*</filename>). These checkers will decide if
  67     the filesystem should actually be checked based on the time since
  68     last check, number of mounts, unclean unmount, etc.</para>
  69
  70     <para>If a file system check fails for a service without
  71     <option>nofail</option>, emergency mode is activated, by isolating
  72     to <filename>emergency.target</filename>.</para>
  73   </refsect1>
  74
  75   <refsect1>
  76     <title>Kernel Command Line</title>
  77
  78     <para><filename>systemd-fsck</filename> understands these kernel
  79     command line parameters:</para>
  80
  81     <variablelist class='kernel-commandline-options'>
  82       <varlistentry>
  83         <term><varname>fsck.mode=</varname></term>
  84
  85         <listitem><para>One of <literal>auto</literal>,
  86         <literal>force</literal>, <literal>skip</literal>. Controls
  87         the mode of operation. The default is <literal>auto</literal>,
  88         and ensures that file system checks are done when the file
  89         system checker deems them necessary. <literal>force</literal>
  90         unconditionally results in full file system checks.
  91         <literal>skip</literal> skips any file system
  92         checks.</para></listitem>
  93       </varlistentry>
  94
  95       <varlistentry>
  96         <term><varname>fsck.repair=</varname></term>
  97
  98         <listitem><para>One of <literal>preen</literal>,
  99         <literal>yes</literal>, <literal>no</literal>. Controls the
 100         mode of operation. The default is <literal>preen</literal>,
 101         and will automatically repair problems that can be safely
 102         fixed. <literal>yes</literal> will answer yes to all
 103         questions by fsck and <literal>no</literal> will answer no to
 104         all questions. </para></listitem>
 105       </varlistentry>
 106     </variablelist>
 107   </refsect1>
 108
 109   <refsect1>
 110     <title>See Also</title>
 111     <para>
 112       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 113       <citerefentry project='man-pages'><refentrytitle>fsck</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 114       <citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 115       <citerefentry project='man-pages'><refentrytitle>fsck.btrfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 116       <citerefentry project='man-pages'><refentrytitle>fsck.cramfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 117       <citerefentry project='man-pages'><refentrytitle>fsck.ext4</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 118       <citerefentry project='man-pages'><refentrytitle>fsck.fat</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 119       <citerefentry project='man-pages'><refentrytitle>fsck.hfsplus</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 120       <citerefentry project='man-pages'><refentrytitle>fsck.minix</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 121       <citerefentry project='man-pages'><refentrytitle>fsck.ntfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 122       <citerefentry project='man-pages'><refentrytitle>fsck.xfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 123     </para>
 124   </refsect1>
 125
 126 </refentry>