man/systemd-fsck@.service.xml

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   3 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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   5 <!-- SPDX-License-Identifier: LGPL-2.1+ -->
   6 <refentry id="systemd-fsck@.service">
   7
   8   <refentryinfo>
   9     <title>systemd-fsck@.service</title>
  10     <productname>systemd</productname>
  11   </refentryinfo>
  12
  13   <refmeta>
  14     <refentrytitle>systemd-fsck@.service</refentrytitle>
  15     <manvolnum>8</manvolnum>
  16   </refmeta>
  17
  18   <refnamediv>
  19     <refname>systemd-fsck@.service</refname>
  20     <refname>systemd-fsck-root.service</refname>
  21     <refname>systemd-fsck</refname>
  22     <refpurpose>File system checker logic</refpurpose>
  23   </refnamediv>
  24
  25   <refsynopsisdiv>
  26     <para><filename>systemd-fsck@.service</filename></para>
  27     <para><filename>systemd-fsck-root.service</filename></para>
  28     <para><filename>/usr/lib/systemd/systemd-fsck</filename></para>
  29   </refsynopsisdiv>
  30
  31   <refsect1>
  32     <title>Description</title>
  33
  34     <para><filename>systemd-fsck@.service</filename> and
  35     <filename>systemd-fsck-root.service</filename> are services
  36     responsible for file system checks. They are instantiated for each
  37     device that is configured for file system checking.
  38     <filename>systemd-fsck-root.service</filename> is responsible for
  39     file system checks on the root file system, but only if the
  40     root filesystem was not checked in the initramfs.
  41     <filename>systemd-fsck@.service</filename> is used for all other
  42     file systems and for the root file system in the initramfs.</para>
  43
  44     <para>These services are started at boot if
  45     <option>passno</option> in <filename>/etc/fstab</filename> for the
  46     file system is set to a value greater than zero. The file system
  47     check for root is performed before the other file systems. Other
  48     file systems may be checked in parallel, except when they are on
  49     the same rotating disk.</para>
  50
  51     <para><filename>systemd-fsck</filename> does not know any details
  52     about specific filesystems, and simply executes file system
  53     checkers specific to each filesystem type
  54     (<filename>/sbin/fsck.*</filename>). These checkers will decide if
  55     the filesystem should actually be checked based on the time since
  56     last check, number of mounts, unclean unmount, etc.</para>
  57
  58     <para>If a file system check fails for a service without
  59     <option>nofail</option>, emergency mode is activated, by isolating
  60     to <filename>emergency.target</filename>.</para>
  61   </refsect1>
  62
  63   <refsect1>
  64     <title>Kernel Command Line</title>
  65
  66     <para><filename>systemd-fsck</filename> understands these kernel
  67     command line parameters:</para>
  68
  69     <variablelist class='kernel-commandline-options'>
  70       <varlistentry>
  71         <term><varname>fsck.mode=</varname></term>
  72
  73         <listitem><para>One of <literal>auto</literal>,
  74         <literal>force</literal>, <literal>skip</literal>. Controls
  75         the mode of operation. The default is <literal>auto</literal>,
  76         and ensures that file system checks are done when the file
  77         system checker deems them necessary. <literal>force</literal>
  78         unconditionally results in full file system checks.
  79         <literal>skip</literal> skips any file system
  80         checks.</para></listitem>
  81       </varlistentry>
  82
  83       <varlistentry>
  84         <term><varname>fsck.repair=</varname></term>
  85
  86         <listitem><para>One of <literal>preen</literal>,
  87         <literal>yes</literal>, <literal>no</literal>. Controls the
  88         mode of operation. The default is <literal>preen</literal>,
  89         and will automatically repair problems that can be safely
  90         fixed. <literal>yes</literal> will answer yes to all
  91         questions by fsck and <literal>no</literal> will answer no to
  92         all questions. </para></listitem>
  93       </varlistentry>
  94     </variablelist>
  95   </refsect1>
  96
  97   <refsect1>
  98     <title>See Also</title>
  99     <para>
 100       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 101       <citerefentry project='man-pages'><refentrytitle>fsck</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 102       <citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 103       <citerefentry project='man-pages'><refentrytitle>fsck.btrfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 104       <citerefentry project='man-pages'><refentrytitle>fsck.cramfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 105       <citerefentry project='man-pages'><refentrytitle>fsck.ext4</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 106       <citerefentry project='man-pages'><refentrytitle>fsck.fat</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 107       <citerefentry project='man-pages'><refentrytitle>fsck.hfsplus</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 108       <citerefentry project='man-pages'><refentrytitle>fsck.minix</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 109       <citerefentry project='man-pages'><refentrytitle>fsck.ntfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 110       <citerefentry project='man-pages'><refentrytitle>fsck.xfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 111     </para>
 112   </refsect1>
 113
 114 </refentry>