man/systemd-fsck@.service.xml

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   7   Copyright 2012 Lennart Poettering
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  22 <refentry id="systemd-fsck@.service">
  23
  24   <refentryinfo>
  25     <title>systemd-fsck@.service</title>
  26     <productname>systemd</productname>
  27
  28     <authorgroup>
  29       <author>
  30         <contrib>Developer</contrib>
  31         <firstname>Lennart</firstname>
  32         <surname>Poettering</surname>
  33         <email>lennart@poettering.net</email>
  34       </author>
  35     </authorgroup>
  36   </refentryinfo>
  37
  38   <refmeta>
  39     <refentrytitle>systemd-fsck@.service</refentrytitle>
  40     <manvolnum>8</manvolnum>
  41   </refmeta>
  42
  43   <refnamediv>
  44     <refname>systemd-fsck@.service</refname>
  45     <refname>systemd-fsck-root.service</refname>
  46     <refname>systemd-fsck</refname>
  47     <refpurpose>File system checker logic</refpurpose>
  48   </refnamediv>
  49
  50   <refsynopsisdiv>
  51     <para><filename>systemd-fsck@.service</filename></para>
  52     <para><filename>systemd-fsck-root.service</filename></para>
  53     <para><filename>/usr/lib/systemd/systemd-fsck</filename></para>
  54   </refsynopsisdiv>
  55
  56   <refsect1>
  57     <title>Description</title>
  58
  59     <para><filename>systemd-fsck@.service</filename> and
  60     <filename>systemd-fsck-root.service</filename> are services
  61     responsible for file system checks. They are instantiated for each
  62     device that is configured for file system checking.
  63     <filename>systemd-fsck-root.service</filename> is responsible for
  64     file system checks on the root file system, but in only if the
  65     root filesystem wasn't checked in the initramfs.
  66     <filename>systemd-fsck@.service</filename> is used for all other
  67     file systems and for the root file system in the initramfs.</para>
  68
  69     <para>Those services are started at boot if
  70     <option>passno</option> in <filename>/etc/fstab</filename> for the
  71     file system is set to a value greater than zero. The file system
  72     check for root is performed before the other file systems. Other
  73     file systems may be checked in parallel, except when they are one
  74     the same rotating disk.</para>
  75
  76     <para><filename>systemd-fsck</filename> does not know any details
  77     about specific filesystems, and simply executes file system
  78     checkers specific to each filesystem type
  79     (<filename>/sbin/fsck.*</filename>). This helper will decide if
  80     the filesystem should actually be checked based on the time since
  81     last check, number of mounts, unclean unmount, etc.</para>
  82
  83     <para>If a file system check fails for a service without
  84     <option>nofail</option>, emergency mode is activated, by isolating
  85     to <filename>emergency.target</filename>.</para>
  86   </refsect1>
  87
  88   <refsect1>
  89     <title>Kernel Command Line</title>
  90
  91     <para><filename>systemd-fsck</filename> understands one kernel
  92     command line parameter:</para>
  93
  94     <variablelist class='kernel-commandline-options'>
  95       <varlistentry>
  96         <term><varname>fsck.mode=</varname></term>
  97
  98         <listitem><para>One of <literal>auto</literal>,
  99         <literal>force</literal>, <literal>skip</literal>. Controls
 100         the mode of operation. The default is <literal>auto</literal>,
 101         and ensures that file system checks are done when the file
 102         system checker deems them necessary. <literal>force</literal>
 103         unconditionally results in full file system checks.
 104         <literal>skip</literal> skips any file system
 105         checks.</para></listitem>
 106       </varlistentry>
 107
 108       <varlistentry>
 109         <term><varname>fsck.repair=</varname></term>
 110
 111         <listitem><para>One of <literal>preen</literal>,
 112         <literal>yes</literal>, <literal>no</literal>. Controls the
 113         mode of operation. The default is <literal> preen</literal>,
 114         and will automatically repair problems that can be safely
 115         fixed. <literal>yes </literal> will answer yes to all
 116         questions by fsck and <literal>no</literal> will answer no to
 117         all questions. </para></listitem>
 118       </varlistentry>
 119     </variablelist>
 120   </refsect1>
 121
 122   <refsect1>
 123     <title>See Also</title>
 124     <para>
 125       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 126       <citerefentry project='man-pages'><refentrytitle>fsck</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 127       <citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 128       <citerefentry project='man-pages'><refentrytitle>fsck.btrfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 129       <citerefentry project='man-pages'><refentrytitle>fsck.cramfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 130       <citerefentry project='man-pages'><refentrytitle>fsck.ext4</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 131       <citerefentry project='man-pages'><refentrytitle>fsck.fat</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 132       <citerefentry project='man-pages'><refentrytitle>fsck.hfsplus</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 133       <citerefentry project='man-pages'><refentrytitle>fsck.minix</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 134       <citerefentry project='man-pages'><refentrytitle>fsck.ntfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 135       <citerefentry project='man-pages'><refentrytitle>fsck.xfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 136     </para>
 137   </refsect1>
 138
 139 </refentry>