-various performance statistics which is provides via the C<unixsock plugin>.
-This program is called by Nagios, connects to the UNIX socket and reads the
-values from collectd. It then returns B<OKAY>, B<WARNING> or B<CRITICAL>
-depending on the values and the ranges provided by Nagios.
+various performance statistics which is provides via the C<unixsock plugin>,
+see L<collectd-unixsock(5)>. This program is called by Nagios, connects to the
+UNIX socket and reads the values from collectd. It then returns B<OKAY>,
+B<WARNING> or B<CRITICAL> depending on the values and the ranges provided by
+Nagios.