monitor what services and itself?

I found at that @start_stop_features lists services for monitoring.

@startstop_features = ("web", "dns", "mail", "ftp", "unix", "virus", "spam",
"mysql", "postgres"«»);
But how add more services there correctly?
Is there a menu for this task? (I found only a global monitor option)
What is "unix" service?
How monitor virtualmin itself without adding another program (monit, zabbix, softdog, ldirectord…)?
Andre Felipe Machado

Hi Andre,

If you want more control over monitoring and restarting of services, go to Webmin -> Others -> System and Server Status. There you can create monitors for a variety of standard servers (including Webmin itself), and define commands that get run if a monitored server goes down.