2010-07-01 23:17:55 +00:00
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<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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2015-02-04 02:14:13 +00:00
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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2010-07-01 23:17:55 +00:00
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<!--
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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2012-04-11 22:20:58 +00:00
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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2010-07-01 23:17:55 +00:00
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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2012-04-11 22:20:58 +00:00
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Lesser General Public License for more details.
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2010-07-01 23:17:55 +00:00
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2012-04-11 22:20:58 +00:00
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You should have received a copy of the GNU Lesser General Public License
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2010-07-01 23:17:55 +00:00
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="systemd.automount">
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<refentryinfo>
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<title>systemd.automount</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd.automount</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd.automount</refname>
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<refpurpose>Automount unit configuration</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename><replaceable>automount</replaceable>.automount</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>A unit configuration file whose name ends in
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<literal>.automount</literal> encodes information about a file
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system automount point controlled and supervised by
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systemd.</para>
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<para>This man page lists the configuration options specific to
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this unit type. See
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for the common options of all unit configuration files. The common
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configuration items are configured in the generic [Unit] and
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[Install] sections. The automount specific configuration options
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are configured in the [Automount] section.</para>
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<para>Automount units must be named after the automount
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directories they control. Example: the automount point
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<filename noindex='true'>/home/lennart</filename> must be
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configured in a unit file
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<filename>home-lennart.automount</filename>. For details about the
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escaping logic used to convert a file system path to a unit name
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see
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
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<para>For each automount unit file a matching mount unit file (see
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<citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for details) must exist which is activated when the automount path
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is accessed. Example: if an automount unit
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<filename>home-lennart.automount</filename> is active and the user
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accesses <filename>/home/lennart</filename> the mount unit
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<filename>home-lennart.mount</filename> will be activated.</para>
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<para>Automount units may be used to implement on-demand mounting
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as well as parallelized mounting of file systems.</para>
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<para>If an automount point is beneath another mount point in the
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file system hierarchy, a dependency between both units is created
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automatically.</para>
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</refsect1>
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<refsect1>
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<title><filename>fstab</filename></title>
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<para>Automount units may either be configured via unit files, or
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via <filename>/etc/fstab</filename> (see
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<citerefentry project='man-pages'><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for details).</para>
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<para>For details how systemd parses
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<filename>/etc/fstab</filename> see
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<citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
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<para>If an automount point is configured in both
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<filename>/etc/fstab</filename> and a unit file, the configuration
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in the latter takes precedence.</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<para>Automount files must include an [Automount] section, which
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carries information about the file system automount points it
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supervises. The options specific to the [Automount] section of
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automount units are the following:</para>
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<variablelist class='unit-directives'>
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<varlistentry>
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<term><varname>Where=</varname></term>
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<listitem><para>Takes an absolute path of a directory of the
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automount point. If the automount point does not exist at time
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that the automount point is installed, it is created. This
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string must be reflected in the unit filename. (See above.)
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This option is mandatory.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>DirectoryMode=</varname></term>
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<listitem><para>Directories of automount points (and any
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parent directories) are automatically created if needed. This
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option specifies the file system access mode used when
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creating these directories. Takes an access mode in octal
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notation. Defaults to 0755.</para></listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry project='die-net'><refentrytitle>automount</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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