mirror of
https://github.com/systemd/systemd.git
synced 2024-12-19 15:13:36 +08:00
111 lines
5.2 KiB
XML
111 lines
5.2 KiB
XML
<?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-homed.service" conditional='ENABLE_HOMED'>
|
|
|
|
<refentryinfo>
|
|
<title>systemd-homed.service</title>
|
|
<productname>systemd</productname>
|
|
</refentryinfo>
|
|
|
|
<refmeta>
|
|
<refentrytitle>systemd-homed.service</refentrytitle>
|
|
<manvolnum>8</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>systemd-homed.service</refname>
|
|
<refname>systemd-homed</refname>
|
|
<refpurpose>Home Area/User Account Manager</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<para><filename>systemd-homed.service</filename></para>
|
|
<para><filename>/usr/lib/systemd/systemd-homed</filename></para>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para><command>systemd-homed</command> is a system service that may be used to create, remove, change or
|
|
inspect home areas (directories and network mounts and real or loopback block devices with a filesystem,
|
|
optionally encrypted).</para>
|
|
|
|
<para>Most of <command>systemd-homed</command>'s functionality is accessible through the
|
|
<citerefentry><refentrytitle>homectl</refentrytitle><manvolnum>1</manvolnum></citerefentry> command.</para>
|
|
|
|
<para>See the <ulink url="https://systemd.io/HOME_DIRECTORY">Home Directories</ulink> documentation for
|
|
details about the format and design of home areas managed by
|
|
<filename>systemd-homed.service</filename>.</para>
|
|
|
|
<para>Each home directory managed by <filename>systemd-homed.service</filename> synthesizes a local user
|
|
and group. These are made available to the system using the <ulink
|
|
url="https://systemd.io/USER_GROUP_API">User/Group Record Lookup API via Varlink</ulink>, and thus may be
|
|
browsed with
|
|
<citerefentry><refentrytitle>userdbctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Key Management</title>
|
|
|
|
<para>User records are cryptographically signed with a public/private key pair (the signature is part of
|
|
the JSON record itself). For a user to be permitted to log in locally the public key matching the
|
|
signature of their user record must be installed. For a user record to be modified locally the private
|
|
key matching the signature must be installed locally, too. The keys are stored in the
|
|
<filename>/var/lib/systemd/home/</filename> directory:</para>
|
|
|
|
<variablelist>
|
|
|
|
<varlistentry>
|
|
<term><filename>/var/lib/systemd/home/local.private</filename></term>
|
|
|
|
<listitem><para>The private key of the public/private key pair used for local records. Currently,
|
|
only a single such key may be installed.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><filename>/var/lib/systemd/home/local.public</filename></term>
|
|
|
|
<listitem><para>The public key of the public/private key pair used for local records. Currently,
|
|
only a single such key may be installed.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><filename>/var/lib/systemd/home/*.public</filename></term>
|
|
|
|
<listitem><para>Additional public keys. Any users whose user records are signed with any of these keys
|
|
are permitted to log in locally. An arbitrary number of keys may be installed this
|
|
way.</para></listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
|
|
<para>All key files listed above are in PEM format.</para>
|
|
|
|
<para>In order to migrate a home directory from a host <literal>foobar</literal> to another host
|
|
<literal>quux</literal> it is hence sufficient to copy
|
|
<filename>/var/lib/systemd/home/local.public</filename> from the host <literal>foobar</literal> to
|
|
<literal>quux</literal>, maybe calling the file on the destination <filename
|
|
index="false">/var/lib/systemd/home/foobar.public</filename>, reflecting the origin of the key. If the
|
|
user record should be modifiable on <literal>quux</literal> the pair
|
|
<filename>/var/lib/systemd/home/local.public</filename> and
|
|
<filename>/var/lib/systemd/home/local.private</filename> need to be copied from <literal>foobar</literal>
|
|
to <literal>quux</literal>, and placed under the identical paths there, as currently only a single
|
|
private key is supported per host. Note of course that the latter means that user records
|
|
generated/signed before the key pair is copied in, lose their validity.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>homed.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>homectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>pam_systemd_home</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>userdbctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>org.freedesktop.home1</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|