"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
-<refentry id="systemd-journald.service">
+<refentry id="systemd-journald.service"
+ xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>systemd-journald.service</title>
</refnamediv>
<refsynopsisdiv>
- <para><filename>systemd-journald.service</filename></para>
- <para><filename>systemd-journald.socket</filename></para>
- <para><filename>systemd-journald-dev-log.socket</filename></para>
- <para><filename>systemd-journald-audit.socket</filename></para>
- <para><filename>systemd-journald@.service</filename></para>
- <para><filename>systemd-journald@.socket</filename></para>
- <para><filename>systemd-journald-varlink@.socket</filename></para>
- <para><filename>/usr/lib/systemd/systemd-journald</filename></para>
+ <para><simplelist>
+ <member><filename>systemd-journald.service</filename></member>
+ <member><filename>systemd-journald.socket</filename></member>
+ <member><filename>systemd-journald-dev-log.socket</filename></member>
+ <member><filename>systemd-journald-audit.socket</filename></member>
+ <member><filename>systemd-journald@.service</filename></member>
+ <member><filename>systemd-journald@.socket</filename></member>
+ <member><filename>systemd-journald-varlink@.socket</filename></member>
+ <member><filename>/usr/lib/systemd/systemd-journald</filename></member>
+ </simplelist></para>
</refsynopsisdiv>
<refsect1>
project='man-pages'><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>
call</para></listitem>
- <listitem><para>Structured system log messages via the native
- Journal API, see
- <citerefentry><refentrytitle>sd_journal_print</refentrytitle><manvolnum>3</manvolnum></citerefentry></para></listitem>
+ <listitem><para>Structured system log messages via the native Journal API, see
+ <citerefentry><refentrytitle>sd_journal_print</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ and <ulink url="https://systemd.io/JOURNAL_NATIVE_PROTOCOL">Native Journal
+ Protocol</ulink></para></listitem>
<listitem><para>Standard output and standard error of service units. For further details see
below.</para></listitem>
</para>
<para>Log data collected by the journal is primarily text-based but can also include binary data where
- necessary. Individual fields making up a log record stored in the journal may be up to 2^64-1 bytes in size.</para>
+ necessary. Individual fields making up a log record stored in the journal may be up to 2⁶⁴-1 bytes in size.</para>
<para>The journal service stores log data either persistently below <filename>/var/log/journal</filename> or in a
volatile way below <filename>/run/log/journal/</filename> (in the latter case it is lost at reboot). By default, log
<citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> to configure
where log data is placed, independently of the existence of <filename>/var/log/journal/</filename>.</para>
+ <para>Note that journald will initially use volatile storage, until a call to
+ <command>journalctl --flush</command> (or sending <constant>SIGUSR1</constant> to journald) will cause
+ it to switch to persistent logging (under the conditions mentioned above). This is done automatically
+ on boot via <literal>systemd-journal-flush.service</literal>.</para>
+
<para>On systems where <filename>/var/log/journal/</filename> does not exist yet but where persistent logging is
desired (and the default <filename>journald.conf</filename> is used), it is sufficient to create the directory, and
ensure it has the correct access modes and ownership:</para>
<command>journalctl --flush</command> command to request flushing of the journal files, and wait for
the operation to complete. See
<citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry> for
- details.</para></listitem>
+ details.</para>
+
+ <xi:include href="version-info.xml" xpointer="v186"/></listitem>
</varlistentry>
<varlistentry>
<listitem><para>Request immediate rotation of the journal files. Use the <command>journalctl
--rotate</command> command to request journal file rotation, and wait for the operation to
- complete.</para></listitem>
+ complete.</para>
+
+ <xi:include href="version-info.xml" xpointer="v186"/></listitem>
</varlistentry>
<varlistentry>
<listitem><para>Request that all unwritten log data is written to disk. Use the <command>journalctl
--sync</command> command to trigger journal synchronization, and wait for the operation to
- complete.</para></listitem>
+ complete.</para>
+
+ <xi:include href="version-info.xml" xpointer="v228"/></listitem>
</varlistentry>
</variablelist>
</refsect1>
<para>See
<citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for information about these settings.</para>
+
+ <xi:include href="version-info.xml" xpointer="v186"/>
</listitem>
</varlistentry>
<listitem><para>Configure <command>systemd-journald</command> behavior. See
<citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
- </para></listitem>
+ </para>
+
+ <xi:include href="version-info.xml" xpointer="v206"/></listitem>
</varlistentry>
<varlistentry>
archived journal files to limit disk use. See <varname>SystemMaxUse=</varname>
and related settings in
<citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
- </para></listitem>
+ </para>
+
+ <xi:include href="version-info.xml" xpointer="v206"/></listitem>
</varlistentry>
<varlistentry>
<listitem><para>Sockets and other file node paths that <command>systemd-journald</command> will
listen on and are visible in the file system. In addition to these,
<command>systemd-journald</command> can listen for audit events using <citerefentry
- project='man-pages'><refentrytitle>netlink</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para></listitem>
+ project='man-pages'><refentrytitle>netlink</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
+ depending on whether <literal>systemd-journald-audit.socket</literal> is enabled or
+ not.</para>
+
+ <xi:include href="version-info.xml" xpointer="v228"/></listitem>
</varlistentry>
</variablelist>
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