+<?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">
+
+<!--
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+-->
+
+<refentry id="systemd-journald.service">
+
+ <refentryinfo>
+ <title>systemd-journald</title>
+ <productname>systemd</productname>
+
+ <authorgroup>
+ <author>
+ <contrib>Developer</contrib>
+ <firstname>Lennart</firstname>
+ <surname>Poettering</surname>
+ <email>lennart@poettering.net</email>
+ </author>
+ </authorgroup>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>systemd-journald</refentrytitle>
+ <manvolnum>8</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>systemd-journald.service</refname>
+ <refname>systemd-journald</refname>
+ <refpurpose>systemd Journal Service</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <para><filename>systemd-journald.service</filename></para>
+ <para><filename>/usr/lib/systemd/systemd-journald</filename></para>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <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
+ unfakeable way. See
+ <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+ for more information about the collected meta data.
+ </para>
+
+ <para>Log data collected by the journal is primarily
+ text based but can also include binary data where
+ 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
+ <filename>/run/log/journal/</filename>. Since
+ <filename>/run/</filename> is volatile log data is
+ lost at reboot. To make the data persistant it
+ is sufficient to create
+ <filename>/var/log/journal/</filename> where
+ <filename>systemd-journald</filename> will then store
+ the data.</para>
+
+ <para><filename>systemd-journald</filename> will
+ forward all received log messages to the AF_UNIX
+ SOCK_DGRAM socket
+ <filename>/run/systemd/journal/syslog</filename> (if it exists) which
+ may be used by UNIX syslog daemons to process the data
+ further.</para>
+
+ <para>See
+ <citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ for information about the configuration of this
+ service.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>
~ianmdlvl / elogind.git / commitdiff