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man: information about available properties
https://bugzilla.redhat.com/show_bug.cgi?id=1144496
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@ -114,12 +114,30 @@
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<listitem>
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<para>When showing unit/job/manager properties with the
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<command>show</command> command, limit display to certain
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properties as specified as argument. If not specified, all
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set properties are shown. The argument should be a
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<command>show</command> command, limit display to properties
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specified in the argument. The argument should be a
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comma-separated list of property names, such as
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<literal>MainPID</literal>. If specified more than once, all
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properties with the specified names are shown.</para>
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<literal>MainPID</literal>. Unless specified, all known
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properties are shown. If specified more than once, all
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properties with the specified names are shown. Shell
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completion is implemented for property names.</para>
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<para>For the manager itself,
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<command>systemctl show</command> will show all available
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properties. Those properties are documented in
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<citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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</para>
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<para>Properties for units vary by unit type, so showing any
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unit (even a non-existent one) is a way to list properties
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pertaining to this type. Similarly showing any job will list
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properties pertaining to all jobs. Properties for units are
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documented in
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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and the pages for individual unit types
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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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etc.</para>
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</listitem>
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</varlistentry>
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