<term><option>-f</option></term>
<term><option>--force</option></term>
- <listitem><para>Force immediate halt, power-off, reboot. Do
- not contact the init system.</para></listitem>
+ <listitem><para>Force immediate halt, power-off, or reboot. When
+ specified once, this results in an immediate but clean shutdown
+ by the system manager. When specified twice, this results in an
+ immediate shutdown without contacting the system manager. See the
+ description of <option>--force</option> in
+ <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ for more details.</para></listitem>
</varlistentry>
<varlistentry>