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man: document new shutdown features
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Lennart Poettering
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@ -49,7 +49,7 @@
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>shutdown <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="opt">now</arg> <arg choice="opt" rep="repeat">WALL</arg></command>
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<command>shutdown <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="opt">TIME</arg> <arg choice="opt" rep="repeat">WALL</arg></command>
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</cmdsynopsis>
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</refsynopsisdiv>
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@ -59,11 +59,30 @@
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<para><command>shutdown</command> may be used to halt,
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power-off or reboot the machine.</para>
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<para>The first argument should be the string
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<command>now</command> which however is ignored by
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this implementation. Optionally, this may be followed
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by a wall message to be sent to all logged-in users
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before going down.</para>
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<para>The first argument may be a time string (which
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is usually <literal>now</literal>). Optionally, this
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may be followed by a wall message to be sent to all
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logged-in users before going down.</para>
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<para>The time string may either be in the format
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<literal>hh:mm</literal> for hour/minutes specifying
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the time to execute the shutdown at, specified in 24h
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clock format. Alternatively it may be in the syntax
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<literal>+m</literal> referring to the specified
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number of minutes m from now. <literal>now</literal>
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is an alias for <literal>+0</literal>, i.e. for
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triggering an immediate shutdown. If no time argument
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is specified, <literal>now</literal> is
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implied.</para>
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<para>Note that to specify a wall message you must
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speciy a time argument, too.</para>
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<para>If the time argument is used, 5 minutes
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before the system goes down the
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<filename>/etc/nologin</filename> file is created to
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ensure that further logins shall not be
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allowed.</para>
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</refsect1>
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<refsect1>
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@ -126,6 +145,39 @@
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message before
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halt, power-off, reboot.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-f</option></term>
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<listitem><para>Skip file system check
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on reboot. This is equivalent to
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creating the
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<filename>/fastboot</filename> file
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before going down.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-F</option></term>
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<listitem><para>Force file system
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check on reboot. This is equivalent to
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creating the
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<filename>/forcefsck</filename> file
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before going down.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-c</option></term>
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<listitem><para>Cancel a pending
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shutdown. This may be used cancel the
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effect of an invocation of
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<command>shutdown</command> with a
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time argument that is not
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<literal>+0</literal> or
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<literal>now</literal>.</para></listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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@ -655,6 +655,26 @@
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connected to syslog or the
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kernel log buffer.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><filename>systemd-shutdownd.service</filename></term>
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<listitem>
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<para>This is internally used
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by
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<citerefentry><refentrytitle>shutdown</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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to implement delayed shutdowns.</para>
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<para>This is a
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socket-activated service, see
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<filename>system-shutdownd.socket</filename>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><filename>systemd-shutdownd.socket</filename></term>
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<listitem>
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<para>Socket activation unit
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for
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<filename>system-shutdownd.service</filename>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><filename>umount.target</filename></term>
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@ -723,9 +743,9 @@
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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<citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.target</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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</para>
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</refsect1>
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@ -937,6 +937,17 @@
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abstract namespace.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><filename>@/org/freedesktop/systemd1/shutdown</filename></term>
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<listitem><para>Used internally by the
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<citerefentry><refentrytitle>shutdown</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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tool to implement delayed
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shutdowns. This is an AF_UNIX datagram
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socket in the Linux abstract
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namespace.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><filename>@/org/freedesktop/systemd1/private</filename></term>
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