necessary.</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><option>--order</option></term>
+ <term><option>--require</option></term>
+
+ <listitem><para>When used in
+ conjunction with the
+ <command>dot</command> command (see
+ below), selects which dependencies are
+ shown in the dependency graph. If
+ <option>--order</option> is passed
+ only dependencies of type
+ <varname>After=</varname> or
+ <varname>Before=</varname> are
+ shown. If <option>--require</option>
+ is passed only dependencies of type
+ <varname>Requires=</varname>,
+ <varname>RequiresOverridable=</varname>,
+ <varname>Requisite=</varname>,
+ <varname>RequisiteOverridable=</varname>,
+ <varname>Wants=</varname> and
+ <varname>Conflicts=</varname> are
+ shown. If neither is passed, shows
+ dependencies of all these
+ types.</para></listitem>
+ </varlistentry>
+
<varlistentry>
<term><option>--system</option></term>
be parsed by
applications.</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><command>dot</command></term>
+
+ <listitem><para>Generate textual
+ dependency graph description in dot
+ format for further processing with the
+ GraphViz
+ <citerefentry><refentrytitle>dot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ tool. Use a command line like
+ <command>systemctl dot | dot -Tsvg >
+ systemd.svg</command> to generate a
+ graphical dependency tree. Unless
+ <option>--order</option> or
+ <option>--require</option> is passed
+ the generated graph will show both
+ ordering and requirement
+ dependencies.</para></listitem>
+ </varlistentry>
<varlistentry>
<term><command>snapshot [NAME]</command></term>