#  cd /etc/icinga2/conf.d conf.d Directory (hosts.conf, services.conf, users.conf, notifications.conf, commands.conf, groups.conf, templates.conf, downtimes.conf, timeperiods.conf, api-users.conf, app.conf )
Service icinga.com/docs/icinga2/latest/doc/09-object-types/#service
       
       
Warning/Critical how to define +/- Nagios Guideline (search for " Threshold and Ranges " )