<refnamediv>
<refname>systemd-journald.service</refname>
<refname>systemd-journald.socket</refname>
+ <refname>systemd-journald-dev-log.socket</refname>
<refname>systemd-journald</refname>
<refpurpose>Journal service</refpurpose>
</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>/usr/lib/systemd/systemd-journald</filename></para>
</refsynopsisdiv>
<title>Description</title>
<para><filename>systemd-journald</filename> is a
- system service that collects and stores logging
- data. It creates and maintains structured, indexed
- journals based on logging information that is received
- from the kernel, from user processes via the libc
- <citerefentry><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>
- call, from STDOUT/STDERR of system services or via its
- native API. It will implicitly collect numerous meta
- data fields for each log messages in a secure and
+ system service that collects and stores logging data.
+ It creates and maintains structured, indexed journals
+ based on logging information that is received from a
+ variety of sources:</para>
+
+ <itemizedlist>
+ <listitem><para>Kernel log messages, via kmsg</para></listitem>
+
+ <listitem><para>Simple system log messages, via the
+ libc <citerefentry
+ 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>4</manvolnum></citerefentry></para></listitem>
+
+ <listitem><para>Standard output and
+ standard error of system
+ services</para></listitem>
+
+ <listitem><para>Audit records, via the audit subsystem</para></listitem>
+ </itemizedlist>
+
+ <para>The daemon will implicitly collect numerous
+ metadata fields for each log messages in a secure and
unfakeable way. See
<citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>
- for more information about the collected meta data.
+ for more information about the collected metadata.
</para>
<para>Log data collected by the journal is primarily
necessary. All objects stored in the journal can be up
to 2^64-1 bytes in size.</para>
- <para>By default the journal stores log data in
+ <para>By default, the journal stores log data in
<filename>/run/log/journal/</filename>. Since
<filename>/run/</filename> is volatile, log data is
lost at reboot. To make the data persistent, it
the data.</para>
<para><filename>systemd-journald</filename> will
- forward all received log messages to the <constant>AF_UNIX</constant>
- <constant>SOCK_DGRAM</constant> socket
+ forward all received log messages to the <constant>AF_UNIX</constant>/<constant>SOCK_DGRAM</constant> socket
<filename>/run/systemd/journal/syslog</filename>, if it exists, which
may be used by Unix syslog daemons to process the data
further.</para>
<term><varname>systemd.journald.forward_to_syslog=</varname></term>
<term><varname>systemd.journald.forward_to_kmsg=</varname></term>
<term><varname>systemd.journald.forward_to_console=</varname></term>
+ <term><varname>systemd.journald.forward_to_wall=</varname></term>
<listitem><para>Enables/disables
forwarding of collected log messages
- to syslog, the kernel log buffer or
- the system console.
+ to syslog, the kernel log buffer, the
+ system console or wall.
</para>
<para>See
<citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd-journal</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-coredump</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>setfacl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd_journal_print</refentrytitle><manvolnum>4</manvolnum></citerefentry>,
<command>pydoc systemd.journal</command>.
</para>
</refsect1>