eudev/man/systemd.conf.xml

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<refentry id="systemd.conf">
        <refentryinfo>
                <title>systemd.conf</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.conf</refentrytitle>
                <manvolnum>5</manvolnum>
        </refmeta>

        <refnamediv>
                <refname>systemd.conf</refname>
                <refpurpose>systemd manager configuration file</refpurpose>
        </refnamediv>

        <refsynopsisdiv>
                <para><filename>system.conf</filename></para>
                <para><filename>user.conf</filename></para>
        </refsynopsisdiv>

        <refsect1>
                <title>Description</title>

                <para>When run as system instance systemd reads the
                configuration file <filename>system.conf</filename>,
                otherwise <filename>user.conf</filename>. These
                configuration files contain a few settings controlling
                basic manager operations.</para>

        </refsect1>

        <refsect1>
                <title>Options</title>

                <para>All options are configured in the
                <literal>[Manager]</literal> section:</para>

                <variablelist>

                        <varlistentry>
                                <term><varname>LogLevel=</varname></term>
                                <term><varname>LogTarget=</varname></term>
                                <term><varname>LogColor=</varname></term>
                                <term><varname>LogLocation=</varname></term>
                                <term><varname>DumpCore=yes</varname></term>
                                <term><varname>CrashShell=no</varname></term>
                                <term><varname>ShowStatus=yes</varname></term>
                                <term><varname>SysVConsole=yes</varname></term>
                                <term><varname>CrashChVT=1</varname></term>
                                <term><varname>DefaultStandardOutput=journal</varname></term>
                                <term><varname>DefaultStandardError=inherit</varname></term>

                                <listitem><para>Configures various
                                parameters of basic manager
                                operation. These options may be
                                overridden by the respective command
                                line arguments. See
                                <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
                                for details about these command line
                                arguments.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><varname>CPUAffinity=</varname></term>

                                <listitem><para>Configures the initial
                                CPU affinity for the init
                                process. Takes a space-separated list
                                of CPU indexes.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><varname>DefaultControllers=cpu</varname></term>

                                <listitem><para>Configures in which
                                cgroup controller hierarchies to
                                create per-service cgroups
                                automatically, in addition to the
                                name=systemd named hierarchy. Defaults
                                to 'cpu'. Takes a space separated list
                                of controller names. Pass an empty
                                string to ensure that systemd does not
                                touch any hierarchies but its
                                own.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><varname>JoinControllers=cpu,cpuacct</varname></term>

                                <listitem><para>Configures controllers
                                that shall be mounted in a single
                                hierarchy. By default systemd will
                                mount all controllers which are
                                enabled in the kernel in individual
                                hierachies, with the exception of
                                those listed in this setting. Takes a
                                space separated list of comma
                                separated controller names, in order
                                to allow multiple joined
                                hierarchies. Defaults to
                                'cpu,cpuacct'. Pass an empty string to
                                ensure that systemd mounts all
                                controllers in separate
                                hierarchies.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><varname>RuntimeWatchdogSec=</varname></term>
                                <term><varname>ShutdownWatchdogSec=</varname></term>

                                <listitem><para>Configure the hardware
                                watchdog at runtime and at
                                reboot. Takes a timeout value in
                                seconds (or in other time units if
                                suffixed with <literal>ms</literal>,
                                <literal>min</literal>,
                                <literal>h</literal>,
                                <literal>d</literal>,
                                <literal>w</literal>). If
                                <varname>RuntimeWatchdogSec=</varname>
                                is set to a non-zero value the
                                watchdog hardware
                                (<filename>/dev/watchdog</filename>)
                                will be programmed to automatically
                                reboot the system if it is not
                                contacted within the specified timeout
                                interval. The system manager will
                                ensure to contact it at least once in
                                half the specified timeout
                                interval. This feature requires a
                                hardware watchdog device to be
                                present, as it is commonly the case in
                                embedded and server systems. Not all
                                hardware watchdogs allow configuration
                                of the reboot timeout, in which case
                                the closest available timeout is
                                picked. <varname>ShutdownWatchdogSec=</varname>
                                may be used to configure the hardware
                                watchdog when the system is asked to
                                reboot. It works as a safety net to
                                ensure that the reboot takes place
                                even if a clean reboot attempt times
                                out. By default
                                <varname>RuntimeWatchdogSec=</varname>
                                defaults to 0 (off), and
                                <varname>ShutdownWatchdogSec=</varname>
                                to 10min. These settings have no
                                effect if a hardware watchdog is not
                                available.</para></listitem>
                        </varlistentry>
                </variablelist>
        </refsect1>

        <refsect1>
                  <title>See Also</title>
                  <para>
                          <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
                  </para>
        </refsect1>

</refentry>