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+<?xml version="1.0"?>
+<!--*-nxml-*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+ "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
+<refentry id="systemd-fsck@.service">
+
+ <refentryinfo>
+ <title>systemd-fsck@.service</title>
+ <productname>systemd</productname>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>systemd-fsck@.service</refentrytitle>
+ <manvolnum>8</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>systemd-fsck@.service</refname>
+ <refname>systemd-fsck-root.service</refname>
+ <refname>systemd-fsck-usr.service</refname>
+ <refname>systemd-fsck</refname>
+ <refpurpose>File system checker logic</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <para><filename>systemd-fsck@.service</filename></para>
+ <para><filename>systemd-fsck-root.service</filename></para>
+ <para><filename>systemd-fsck-usr.service</filename></para>
+ <para><filename>/usr/lib/systemd/systemd-fsck</filename></para>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><filename>systemd-fsck@.service</filename>, <filename>systemd-fsck-root.service</filename>, and
+ <filename>systemd-fsck-usr.service</filename> are services responsible for file system checks. They are
+ instantiated for each device that is configured for file system checking.
+ <filename>systemd-fsck-root.service</filename> and <filename>systemd-fsck-usr.service</filename> are
+ responsible for file system checks on the root and /usr file system, respectively, but only if the root
+ filesystem was not checked in the initrd. <filename>systemd-fsck@.service</filename> is used for all
+ other file systems and for the root file system in the initrd.</para>
+
+ <para>These services are started at boot if <option>passno</option> in <filename>/etc/fstab</filename>
+ for the file system is set to a value greater than zero, but only if it is also configured to be
+ mounted at boot (i.e. without <literal>noauto</literal> option). The file system check for root is
+ performed before the other file systems. Other file systems may be checked in parallel, except when
+ they are on the same rotating disk.</para>
+
+ <para><filename>systemd-fsck</filename> does not know any details
+ about specific filesystems, and simply executes file system
+ checkers specific to each filesystem type
+ (<filename>fsck.<replaceable>type</replaceable></filename>). These checkers will decide if
+ the filesystem should actually be checked based on the time since
+ last check, number of mounts, unclean unmount, etc.</para>
+
+ <para><filename>systemd-fsck-root.service</filename> and <filename>systemd-fsck-usr.service</filename>
+ will activate <filename>reboot.target</filename> if <filename>fsck</filename> returns the "System
+ should reboot" condition, or <filename>emergency.target</filename> if <filename>fsck</filename>
+ returns the "Filesystem errors left uncorrected" condition.</para>
+
+ <para><filename>systemd-fsck@.service</filename> will fail if
+ <filename>fsck</filename> returns with either "System should reboot"
+ or "Filesystem errors left uncorrected" conditions. For filesystems
+ listed in <filename>/etc/fstab</filename> without <literal>nofail</literal>
+ or <literal>noauto</literal> options, <literal>local-fs.target</literal>
+ will then activate <filename>emergency.target</filename>.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Kernel Command Line</title>
+
+ <para><filename>systemd-fsck</filename> understands these kernel
+ command line parameters:</para>
+
+ <variablelist class='kernel-commandline-options'>
+ <varlistentry>
+ <term><varname>fsck.mode=</varname></term>
+
+ <listitem><para>One of <literal>auto</literal>,
+ <literal>force</literal>, <literal>skip</literal>. Controls
+ the mode of operation. The default is <literal>auto</literal>,
+ and ensures that file system checks are done when the file
+ system checker deems them necessary. <literal>force</literal>
+ unconditionally results in full file system checks.
+ <literal>skip</literal> skips any file system
+ checks.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>fsck.repair=</varname></term>
+
+ <listitem><para>One of <literal>preen</literal>,
+ <literal>yes</literal>, <literal>no</literal>. Controls the
+ mode of operation. The default is <literal>preen</literal>,
+ and will automatically repair problems that can be safely
+ fixed. <literal>yes</literal> will answer yes to all
+ questions by fsck and <literal>no</literal> will answer no to
+ all questions. </para></listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry project='man-pages'><refentrytitle>fsck</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry project='man-pages'><refentrytitle>fsck.btrfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry project='man-pages'><refentrytitle>fsck.cramfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry project='man-pages'><refentrytitle>fsck.ext4</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry project='man-pages'><refentrytitle>fsck.fat</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry project='man-pages'><refentrytitle>fsck.hfsplus</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry project='man-pages'><refentrytitle>fsck.minix</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry project='man-pages'><refentrytitle>fsck.ntfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry project='man-pages'><refentrytitle>fsck.xfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>