systemd/man/systemd-machine-id-commit.service.xml
Zbigniew Jędrzejewski-Szmek fdbbee37d5 man: drop unused <authorgroup> tags from man sources
Docbook styles required those to be present, even though the templates that we
use did not show those names anywhere. But something changed semi-recently (I
would suspect docbook templates, but there was only a minor version bump in
recent years, and the changelog does not suggest anything related), and builds
now work without those entries. Let's drop this dead weight.

Tested with F26-F29, debian unstable.

$ perl -i -0pe 's/\s*<authorgroup>.*<.authorgroup>//gms' man/*xml
2018-06-14 12:22:18 +02:00

74 lines
2.9 KiB
XML

<?xml version="1.0"?>
<!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
SPDX-License-Identifier: LGPL-2.1+
Copyright © 2014 Didier Roche
-->
<refentry id="systemd-machine-id-commit.service">
<refentryinfo>
<title>systemd-machine-id-commit.service</title>
<productname>systemd</productname>
</refentryinfo>
<refmeta>
<refentrytitle>systemd-machine-id-commit.service</refentrytitle>
<manvolnum>8</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd-machine-id-commit.service</refname>
<refpurpose>Commit a transient machine ID to disk</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>systemd-machine-id-commit.service</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><filename>systemd-machine-id-commit.service</filename> is an
early boot service responsible for committing transient
<filename>/etc/machine-id</filename> files to a writable disk file
system. See
<citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for more information about machine IDs.</para>
<para>This service is started after
<filename>local-fs.target</filename> in case
<filename>/etc/machine-id</filename> is a mount point of its own
(usually from a memory file system such as
<literal>tmpfs</literal>) and /etc is writable. The service will
invoke <command>systemd-machine-id-setup --commit</command>, which
writes the current transient machine ID to disk and unmount the
<filename>/etc/machine-id</filename> file in a race-free manner to
ensure that file is always valid and accessible for other
processes. See
<citerefentry><refentrytitle>systemd-machine-id-setup</refentrytitle><manvolnum>1</manvolnum></citerefentry>
for details.</para>
<para>The main use case of this service are systems where
<filename>/etc/machine-id</filename> is read-only and initially
not initialized. In this case, the system manager will generate a
transient machine ID file on a memory file system, and mount it
over <filename>/etc/machine-id</filename>, during the early boot
phase. This service is then invoked in a later boot phase, as soon
as <filename>/etc</filename> has been remounted writable and the
ID may thus be committed to disk to make it permanent.</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-machine-id-setup</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>