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<?xml version='1.0'?> <!--*-nxml-*-->
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<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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2012-03-16 06:25:14 +08:00
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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2012-04-12 06:20:58 +08:00
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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2012-03-31 05:18:33 +08:00
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<refentry id="journald.conf">
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<refentryinfo>
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<title>journald.conf</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>journald.conf</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>journald.conf</refname>
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<refpurpose>Journal service configuration file</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>/etc/systemd/journald.conf</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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2013-07-02 11:44:04 +08:00
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<para>This file configures various parameters of the
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systemd journal service,
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<citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<para>All options are configured in the
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<literal>[Journal]</literal> section:</para>
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<variablelist>
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2012-08-21 04:13:22 +08:00
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<varlistentry>
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<term><varname>Storage=</varname></term>
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<listitem><para>Controls where to
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store journal data. One of
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<literal>volatile</literal>,
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<literal>persistent</literal>,
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<literal>auto</literal> and
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<literal>none</literal>. If
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<literal>volatile</literal>, journal
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log data will be stored only in
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memory, i.e. below the
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<filename>/run/log/journal</filename>
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hierarchy (which is created if
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needed). If
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<literal>persistent</literal>, data will
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be stored preferably on disk,
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i.e. below the
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<filename>/var/log/journal</filename>
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hierarchy (which is created if
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needed), with a fallback to
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<filename>/run/log/journal</filename>
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(which is created if needed), during
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early boot and if the disk is not
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writable. <literal>auto</literal> is
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similar to
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<literal>persistent</literal> but the
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directory
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<filename>/var/log/journal</filename>
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is not created if needed, so that its
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existence controls where log data
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goes. <literal>none</literal> turns
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off all storage, all log data received
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will be dropped. Forwarding to other
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targets, such as the console, the
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kernel log buffer or a syslog daemon
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will still work however. Defaults to
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<literal>auto</literal>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Compress=</varname></term>
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<listitem><para>Takes a boolean
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value. If enabled (the default), data
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objects that shall be stored in the
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journal and are larger than a certain
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threshold are compressed with the XZ
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compression algorithm before they are
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written to the file
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system.</para></listitem>
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</varlistentry>
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2012-08-21 04:13:22 +08:00
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<varlistentry>
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<term><varname>Seal=</varname></term>
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<listitem><para>Takes a boolean
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value. If enabled (the default), and a
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sealing key is available (as created
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by
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<citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s
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<option>--setup-keys</option>
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command), forward secure sealing (FSS)
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for all persistent journal files is
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enabled. FSS is based on <ulink
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url="https://eprint.iacr.org/2013/397">Seekable
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Sequential Key Generators</ulink> by
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G. A. Marson and B. Poettering and
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may be used to protect journal files
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from unnoticed
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alteration.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>SplitMode=</varname></term>
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<listitem><para>Controls whether to
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split up journal files per user. One
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of <literal>login</literal>,
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<literal>uid</literal> and
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<literal>none</literal>. If
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<literal>login</literal>, each logged-in
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user will get his own journal
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files, but systemd user IDs will log
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into the system journal. If
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<literal>uid</literal>, any user ID
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will get his own journal files
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regardless whether it belongs to a
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system service or refers to a real
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logged in user. If
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<literal>none</literal>, journal files
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are not split up by user and all
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messages are instead stored in the single
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system journal. Note that splitting
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up journal files by user is only
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available for journals stored
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persistently. If journals are stored
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on volatile storage (see above), only a
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single journal file for all user IDs
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is kept. Defaults to
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<literal>login</literal>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>RateLimitInterval=</varname></term>
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<term><varname>RateLimitBurst=</varname></term>
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<listitem><para>Configures the rate
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limiting that is applied to all
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messages generated on the system. If,
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in the time interval defined by
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<varname>RateLimitInterval=</varname>,
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more messages than specified in
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<varname>RateLimitBurst=</varname> are
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logged by a service, all further
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messages within the interval are
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dropped until the interval is over. A
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message about the number of dropped
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messages is generated. This rate
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limiting is applied per-service, so
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that two services which log do not
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interfere with each other's
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2012-11-30 03:06:57 +08:00
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limits. Defaults to 200 messages in
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10s. The time specification for
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<varname>RateLimitInterval=</varname>
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may be specified in the following
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units: <literal>s</literal>,
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<literal>min</literal>,
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<literal>h</literal>,
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<literal>ms</literal>,
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<literal>us</literal>. To turn off any
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kind of rate limiting, set either
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value to 0.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>SystemMaxUse=</varname></term>
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<term><varname>SystemKeepFree=</varname></term>
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<term><varname>SystemMaxFileSize=</varname></term>
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<term><varname>RuntimeMaxUse=</varname></term>
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<term><varname>RuntimeKeepFree=</varname></term>
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<term><varname>RuntimeMaxFileSize=</varname></term>
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<listitem><para>Enforce size limits on
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the journal files stored. The options
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prefixed with
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<literal>System</literal> apply to the
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journal files when stored on a
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persistent file system, more
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specifically
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<filename>/var/log/journal</filename>. The
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options prefixed with
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<literal>Runtime</literal> apply to
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the journal files when stored on a
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volatile in-memory file system, more
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specifically
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<filename>/run/log/journal</filename>. The
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former is used only when
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<filename>/var</filename> is mounted,
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writable, and the directory
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<filename>/var/log/journal</filename>
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exists. Otherwise, only the latter
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applies. Note that this means that
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during early boot and if the
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administrator disabled persistent
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logging, only the latter options apply,
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while the former apply if persistent
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logging is enabled and the system is
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fully booted
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2013-06-25 09:02:16 +08:00
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up. <command>journalctl</command> and
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<command>systemd-journald</command>
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ignore all files with names not ending
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with <literal>.journal</literal> or
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<literal>.journal~</literal>, so only
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such files, located in the appropriate
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directories, are taken into account
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when calculating current disk usage.
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</para>
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<para><varname>SystemMaxUse=</varname>
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and <varname>RuntimeMaxUse=</varname>
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control how much disk space the
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journal may use up at
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maximum. Defaults to 10% of the size
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of the respective file
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system. <varname>SystemKeepFree=</varname>
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and
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<varname>RuntimeKeepFree=</varname>
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control how much disk space
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systemd-journald shall always leave
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free for other uses. Defaults to 15%
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of the size of the respective file
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system. systemd-journald will respect
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both limits, i.e. use the smaller of
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the two values.
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<varname>SystemMaxFileSize=</varname>
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and
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<varname>RuntimeMaxFileSize=</varname>
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control how large individual journal
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files may grow at maximum. This
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influences the granularity in which
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disk space is made available through
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rotation, i.e. deletion of historic
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data. Defaults to one eighth of the
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values configured with
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<varname>SystemMaxUse=</varname> and
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<varname>RuntimeMaxUse=</varname>, so
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that usually seven rotated journal
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2012-10-19 06:56:42 +08:00
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files are kept as history. Specify
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values in bytes or use K, M, G, T, P,
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E as units for the specified sizes
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(equal to 1024, 1024²,... bytes).
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Note that size limits are enforced
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synchronously when journal files are
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extended, and no explicit rotation
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step triggered by time is
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needed.</para></listitem>
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2012-10-17 04:58:07 +08:00
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</varlistentry>
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<varlistentry>
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<term><varname>MaxFileSec=</varname></term>
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|
|
|
|
|
|
|
|
<listitem><para>The maximum time to
|
|
|
|
|
store entries in a single journal
|
2013-07-02 11:44:04 +08:00
|
|
|
file before rotating to the next
|
|
|
|
|
one. Normally, time-based rotation
|
2012-10-17 04:58:07 +08:00
|
|
|
should not be required as size-based
|
|
|
|
|
rotation with options such as
|
|
|
|
|
<varname>SystemMaxFileSize=</varname>
|
|
|
|
|
should be sufficient to ensure that
|
2013-07-02 11:44:04 +08:00
|
|
|
journal files do not grow without
|
2012-10-17 04:58:07 +08:00
|
|
|
bounds. However, to ensure that not
|
|
|
|
|
too much data is lost at once when old
|
2013-07-02 11:44:04 +08:00
|
|
|
journal files are deleted, it might
|
2012-10-17 04:58:07 +08:00
|
|
|
make sense to change this value from
|
|
|
|
|
the default of one month. Set to 0 to
|
|
|
|
|
turn off this feature. This setting
|
|
|
|
|
takes time values which may be
|
2013-07-02 11:44:04 +08:00
|
|
|
suffixed with the units
|
|
|
|
|
<literal>year</literal>,
|
|
|
|
|
<literal>month</literal>,
|
|
|
|
|
<literal>week</literal>, <literal>day</literal>,
|
|
|
|
|
<literal>h</literal> or <literal>m</literal>
|
|
|
|
|
to override the default time unit of
|
2012-10-17 04:58:07 +08:00
|
|
|
seconds.</para></listitem>
|
|
|
|
|
</varlistentry>
|
|
|
|
|
|
|
|
|
|
<varlistentry>
|
|
|
|
|
<term><varname>MaxRetentionSec=</varname></term>
|
|
|
|
|
|
|
|
|
|
<listitem><para>The maximum time to
|
2012-11-07 03:27:38 +08:00
|
|
|
store journal entries. This
|
2012-10-17 04:58:07 +08:00
|
|
|
controls whether journal files
|
|
|
|
|
containing entries older then the
|
|
|
|
|
specified time span are
|
2013-07-02 11:44:04 +08:00
|
|
|
deleted. Normally, time-based deletion
|
2012-10-17 04:58:07 +08:00
|
|
|
of old journal files should not be
|
|
|
|
|
required as size-based deletion with
|
|
|
|
|
options such as
|
|
|
|
|
<varname>SystemMaxUse=</varname>
|
|
|
|
|
should be sufficient to ensure that
|
2013-07-02 11:44:04 +08:00
|
|
|
journal files do not grow without
|
2012-10-17 04:58:07 +08:00
|
|
|
bounds. However, to enforce data
|
2013-07-02 11:44:04 +08:00
|
|
|
retention policies, it might make sense
|
2012-11-07 03:27:38 +08:00
|
|
|
to change this value from the
|
2012-10-17 04:58:07 +08:00
|
|
|
default of 0 (which turns off this
|
2012-11-07 03:27:38 +08:00
|
|
|
feature). This setting also takes
|
2012-10-17 04:58:07 +08:00
|
|
|
time values which may be suffixed with
|
2013-07-02 11:44:04 +08:00
|
|
|
the units <literal>year</literal>,
|
|
|
|
|
<literal>month</literal>,
|
|
|
|
|
<literal>week</literal>, <literal>day</literal>,
|
|
|
|
|
<literal>h</literal> or <literal> m</literal>
|
2012-10-17 04:58:07 +08:00
|
|
|
to override the default time unit of
|
2013-07-02 11:44:04 +08:00
|
|
|
seconds.</para></listitem>
|
2013-03-26 00:49:03 +08:00
|
|
|
</varlistentry>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<varlistentry>
|
|
|
|
|
<term><varname>SyncIntervalSec=</varname></term>
|
|
|
|
|
|
2013-07-24 14:08:57 +08:00
|
|
|
<listitem><para>The timeout before
|
|
|
|
|
synchronizing journal files to
|
|
|
|
|
disk. After syncing, journal files are
|
|
|
|
|
placed in the OFFLINE state. Note that
|
|
|
|
|
syncing is unconditionally done
|
|
|
|
|
immediately after a log message of
|
|
|
|
|
priority CRIT, ALERT or EMERG has been
|
|
|
|
|
logged, this setting hence applies
|
|
|
|
|
only to messages of the levels ERR,
|
|
|
|
|
WARNING, NOTICE, INFO, DEBUG. The
|
|
|
|
|
default timeout is 5 minutes.
|
2013-03-26 00:49:03 +08:00
|
|
|
</para></listitem>
|
2012-03-16 06:25:14 +08:00
|
|
|
</varlistentry>
|
|
|
|
|
|
|
|
|
|
<varlistentry>
|
|
|
|
|
<term><varname>ForwardToSyslog=</varname></term>
|
|
|
|
|
<term><varname>ForwardToKMsg=</varname></term>
|
|
|
|
|
<term><varname>ForwardToConsole=</varname></term>
|
|
|
|
|
|
|
|
|
|
<listitem><para>Control whether log
|
|
|
|
|
messages received by the journal
|
|
|
|
|
daemon shall be forwarded to a
|
|
|
|
|
traditional syslog daemon, to the
|
|
|
|
|
kernel log buffer (kmsg), or to the
|
|
|
|
|
system console. These options take
|
|
|
|
|
boolean arguments. If forwarding to
|
|
|
|
|
syslog is enabled but no syslog daemon
|
2013-07-02 11:44:04 +08:00
|
|
|
is running, the respective option has
|
|
|
|
|
no effect. By default, only forwarding
|
2012-03-16 06:25:14 +08:00
|
|
|
to syslog is enabled. These settings
|
2012-08-09 21:57:24 +08:00
|
|
|
may be overridden at boot time with
|
|
|
|
|
the kernel command line options
|
2012-06-22 07:35:52 +08:00
|
|
|
<literal>systemd.journald.forward_to_syslog=</literal>,
|
|
|
|
|
<literal>systemd.journald.forward_to_kmsg=</literal>
|
2012-03-16 06:25:14 +08:00
|
|
|
and
|
2012-08-09 21:57:24 +08:00
|
|
|
<literal>systemd.journald.forward_to_console=</literal>.
|
2012-03-16 06:25:14 +08:00
|
|
|
</para></listitem>
|
|
|
|
|
</varlistentry>
|
|
|
|
|
|
2012-06-01 23:26:16 +08:00
|
|
|
<varlistentry>
|
|
|
|
|
<term><varname>MaxLevelStore=</varname></term>
|
|
|
|
|
<term><varname>MaxLevelSyslog=</varname></term>
|
|
|
|
|
<term><varname>MaxLevelKMsg=</varname></term>
|
|
|
|
|
<term><varname>MaxLevelConsole=</varname></term>
|
|
|
|
|
|
|
|
|
|
<listitem><para>Controls the maximum
|
|
|
|
|
log level of messages that are stored
|
|
|
|
|
on disk, forwarded to syslog, kmsg or
|
|
|
|
|
the console (if that is enabled, see
|
|
|
|
|
above). As argument, takes one of
|
|
|
|
|
<literal>emerg</literal>,
|
|
|
|
|
<literal>alert</literal>,
|
|
|
|
|
<literal>crit</literal>,
|
|
|
|
|
<literal>err</literal>,
|
|
|
|
|
<literal>warning</literal>,
|
|
|
|
|
<literal>notice</literal>,
|
|
|
|
|
<literal>info</literal>,
|
|
|
|
|
<literal>debug</literal> or integer
|
|
|
|
|
values in the range of 0..7 (corresponding
|
|
|
|
|
to the same levels). Messages equal or below
|
|
|
|
|
the log level specified are
|
|
|
|
|
stored/forwarded, messages above are
|
|
|
|
|
dropped. Defaults to
|
|
|
|
|
<literal>debug</literal> for
|
|
|
|
|
<varname>MaxLevelStore=</varname> and
|
|
|
|
|
<varname>MaxLevelSyslog=</varname>, to
|
|
|
|
|
ensure that the all messages are
|
|
|
|
|
written to disk and forwarded to
|
|
|
|
|
syslog. Defaults to
|
|
|
|
|
<literal>notice</literal> for
|
|
|
|
|
<varname>MaxLevelKMsg=</varname> and
|
|
|
|
|
<literal>info</literal> for
|
|
|
|
|
<varname>MaxLevelConsole=</varname>.</para></listitem>
|
|
|
|
|
</varlistentry>
|
|
|
|
|
|
2012-06-01 07:06:10 +08:00
|
|
|
<varlistentry>
|
|
|
|
|
<term><varname>TTYPath=</varname></term>
|
|
|
|
|
|
|
|
|
|
<listitem><para>Change the console TTY
|
|
|
|
|
to use if
|
|
|
|
|
<varname>ForwardToConsole=yes</varname>
|
|
|
|
|
is used. Defaults to
|
|
|
|
|
<filename>/dev/console</filename>.</para></listitem>
|
|
|
|
|
</varlistentry>
|
|
|
|
|
|
2012-03-16 06:25:14 +08:00
|
|
|
</variablelist>
|
|
|
|
|
|
|
|
|
|
</refsect1>
|
|
|
|
|
|
|
|
|
|
<refsect1>
|
|
|
|
|
<title>See Also</title>
|
|
|
|
|
<para>
|
|
|
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
2012-06-01 07:05:38 +08:00
|
|
|
<citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
2012-03-27 02:58:47 +08:00
|
|
|
<citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
2012-04-04 04:31:48 +08:00
|
|
|
<citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
|
2013-02-12 03:42:24 +08:00
|
|
|
<citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
2012-03-16 06:25:14 +08:00
|
|
|
</para>
|
|
|
|
|
</refsect1>
|
|
|
|
|
|
|
|
|
|
</refentry>
|
