+ enabled, non-zero otherwise. Prints
+ the current enable status. To suppress
+ this output use
+ <option>--quiet</option>.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><command>reenable [NAME...]</command></term>
+
+ <listitem><para>Reenable one or more
+ unit files, as specified on the
+ command line. This is a combination of
+ <command>disable</command> and
+ <command>enable</command> and is
+ useful to reset the symlinks a unit is
+ enabled with to the defaults
+ configured in the
+ <literal>[Install]</literal> section
+ of the unit file.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><command>preset [NAME...]</command></term>
+
+ <listitem><para>Reset one or more unit
+ files, as specified on the command
+ line, to the defaults configured in
+ the preset policy files. This has the
+ same effect as
+ <command>disable</command> or
+ <command>enable</command>, depending
+ how the unit is listed in the preset
+ files. For more information on preset
+ policy format see
+ <citerefentry><refentrytitle>systemd.preset</refentrytitle><manvolnum>5</manvolnum></citerefentry>. For
+ more information on the concept of
+ presets please consult the <ulink
+ url="http://freedesktop.org/wiki/Software/systemd/Preset">Preset</ulink>
+ document.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><command>mask [NAME...]</command></term>
+
+ <listitem><para>Mask one or more unit
+ files, as specified on the command
+ line. This will link these units to
+ <filename>/dev/null</filename>, making
+ it impossible to start them. This is a stronger version
+ of <command>disable</command>, since
+ it prohibits all kinds of activation
+ of the unit, including manual
+ activation. Use this option with
+ care.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><command>unmask [NAME...]</command></term>
+
+ <listitem><para>Unmask one or more
+ unit files, as specified on the
+ command line. This will undo the
+ effect of
+ <command>mask</command>.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><command>link [NAME...]</command></term>
+
+ <listitem><para>Link a unit file that
+ is not in the unit file search paths
+ into the unit file search path. This
+ requires an absolute path to a unit
+ file. The effect of this can be undone
+ with <command>disable</command>. The
+ effect of this command is that a unit
+ file is available for
+ <command>start</command> and other
+ commands although it isn't installed
+ directly in the unit search
+ path.</para>
+ </listitem>