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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/4.5/docbookx.dtd">
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
<refentry id="file-hierarchy" xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>file-hierarchy</title>
<productname>systemd</productname>
</refentryinfo>
<refmeta>
<refentrytitle>file-hierarchy</refentrytitle>
<manvolnum>7</manvolnum>
</refmeta>
<refnamediv>
<refname>file-hierarchy</refname>
<refpurpose>systemd file system hierarchy requirements</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>Operating systems using the
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry> system and
service manager are organized based on a file system hierarchy inspired by UNIX, as described in <ulink
url="https://uapi-group.org/specifications/specs/linux_file_system_hierarchy/"> UAPI.9 Linux File System
Hierarchy</ulink>. Additional requirements on <emphasis>when</emphasis> given parts of the hierarchy
must be available during boot are listed in <ulink url="https://systemd.io/MOUNT_REQUIREMENTS/">Mount
Requirements</ulink>.</para>
<para>Many of the paths described here can be queried
with the
<citerefentry><refentrytitle>systemd-path</refentrytitle><manvolnum>1</manvolnum></citerefentry>
tool.</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para><simplelist>
<member><citerefentry project='man-pages'><refentrytitle>hier</refentrytitle><manvolnum>7</manvolnum></citerefentry></member>
<member><ulink url="http://refspecs.linuxfoundation.org/FHS_3.0/fhs-3.0.html">File System Hierarchy</ulink></member>
<member><ulink url="https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html">XDG Base Directory Specification</ulink></member>
<member><ulink url="https://www.freedesktop.org/wiki/Software/xdg-user-dirs">XDG User Directories</ulink></member>
</simplelist></para>
</refsect1>
</refentry>
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