man/systemd-fsck@.service.xml

   1 <?xml version="1.0"?>
   2 <!--*-nxml-*-->
   3 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
   4 <!ENTITY % entities SYSTEM "custom-entities.ent" >
   5 %entities;
   6 ]>
   7 <!--
   8   This file is part of systemd.
   9
  10   Copyright 2012 Lennart Poettering
  11
  12   systemd is free software; you can redistribute it and/or modify it
  13   under the terms of the GNU Lesser General Public License as published by
  14   the Free Software Foundation; either version 2.1 of the License, or
  15   (at your option) any later version.
  16
  17   systemd is distributed in the hope that it will be useful, but
  18   WITHOUT ANY WARRANTY; without even the implied warranty of
  19   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  20   Lesser General Public License for more details.
  21
  22   You should have received a copy of the GNU Lesser General Public License
  23   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  24 -->
  25 <refentry id="systemd-fsck@.service">
  26
  27   <refentryinfo>
  28     <title>systemd-fsck@.service</title>
  29     <productname>systemd</productname>
  30
  31     <authorgroup>
  32       <author>
  33         <contrib>Developer</contrib>
  34         <firstname>Lennart</firstname>
  35         <surname>Poettering</surname>
  36         <email>lennart@poettering.net</email>
  37       </author>
  38     </authorgroup>
  39   </refentryinfo>
  40
  41   <refmeta>
  42     <refentrytitle>systemd-fsck@.service</refentrytitle>
  43     <manvolnum>8</manvolnum>
  44   </refmeta>
  45
  46   <refnamediv>
  47     <refname>systemd-fsck@.service</refname>
  48     <refname>systemd-fsck-root.service</refname>
  49     <refname>systemd-fsck</refname>
  50     <refpurpose>File system checker logic</refpurpose>
  51   </refnamediv>
  52
  53   <refsynopsisdiv>
  54     <para><filename>systemd-fsck@.service</filename></para>
  55     <para><filename>systemd-fsck-root.service</filename></para>
  56     <para><filename>&rootlibexecdir;/systemd-fsck</filename></para>
  57   </refsynopsisdiv>
  58
  59   <refsect1>
  60     <title>Description</title>
  61
  62     <para><filename>systemd-fsck@.service</filename> and
  63     <filename>systemd-fsck-root.service</filename> are services
  64     responsible for file system checks. They are instantiated for each
  65     device that is configured for file system checking.
  66     <filename>systemd-fsck-root.service</filename> is responsible for
  67     file system checks on the root file system, but in only if the
  68     root filesystem wasn't checked in the initramfs.
  69     <filename>systemd-fsck@.service</filename> is used for all other
  70     file systems and for the root file system in the initramfs.</para>
  71
  72     <para>Those services are started at boot if
  73     <option>passno</option> in <filename>/etc/fstab</filename> for the
  74     file system is set to a value greater than zero. The file system
  75     check for root is performed before the other file systems. Other
  76     file systems may be checked in parallel, except when they are one
  77     the same rotating disk.</para>
  78
  79     <para><filename>systemd-fsck</filename> does not know any details
  80     about specific filesystems, and simply executes file system
  81     checkers specific to each filesystem type
  82     (<filename>/sbin/fsck.*</filename>). This helper will decide if
  83     the filesystem should actually be checked based on the time since
  84     last check, number of mounts, unclean unmount, etc.</para>
  85
  86     <para>If a file system check fails for a service without
  87     <option>nofail</option>, emergency mode is activated, by isolating
  88     to <filename>emergency.target</filename>.</para>
  89   </refsect1>
  90
  91   <refsect1>
  92     <title>Kernel Command Line</title>
  93
  94     <para><filename>systemd-fsck</filename> understands one kernel
  95     command line parameter:</para>
  96
  97     <variablelist class='kernel-commandline-options'>
  98       <varlistentry>
  99         <term><varname>fsck.mode=</varname></term>
 100
 101         <listitem><para>One of <literal>auto</literal>,
 102         <literal>force</literal>, <literal>skip</literal>. Controls
 103         the mode of operation. The default is <literal>auto</literal>,
 104         and ensures that file system checks are done when the file
 105         system checker deems them necessary. <literal>force</literal>
 106         unconditionally results in full file system checks.
 107         <literal>skip</literal> skips any file system
 108         checks.</para></listitem>
 109       </varlistentry>
 110
 111       <varlistentry>
 112         <term><varname>fsck.repair=</varname></term>
 113
 114         <listitem><para>One of <literal>preen</literal>,
 115         <literal>yes</literal>, <literal>no</literal>. Controls the
 116         mode of operation. The default is <literal> preen</literal>,
 117         and will automatically repair problems that can be safely
 118         fixed. <literal>yes </literal> will answer yes to all
 119         questions by fsck and <literal>no</literal> will answer no to
 120         all questions. </para></listitem>
 121       </varlistentry>
 122     </variablelist>
 123   </refsect1>
 124
 125   <refsect1>
 126     <title>See Also</title>
 127     <para>
 128       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 129       <citerefentry project='man-pages'><refentrytitle>fsck</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 130       <citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 131       <citerefentry project='man-pages'><refentrytitle>fsck.btrfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 132       <citerefentry project='man-pages'><refentrytitle>fsck.cramfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 133       <citerefentry project='man-pages'><refentrytitle>fsck.ext4</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 134       <citerefentry project='man-pages'><refentrytitle>fsck.fat</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 135       <citerefentry project='man-pages'><refentrytitle>fsck.hfsplus</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 136       <citerefentry project='man-pages'><refentrytitle>fsck.minix</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 137       <citerefentry project='man-pages'><refentrytitle>fsck.ntfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 138       <citerefentry project='man-pages'><refentrytitle>fsck.xfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 139     </para>
 140   </refsect1>
 141
 142 </refentry>