I'm not sure. I followed these instructions for setting up Nagios.
https://www.digitalocean.com/community/ ... untu-16-04
I presume this is where that would be controlled:
sudo systemctl enable /etc/systemd/system/nagios.service
sudo systemctl start nagios
Should we do it differently?
Here is a service status:
● nagios.service - Nagios
Loaded: loaded (/etc/systemd/system/nagios.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2018-07-26 16:51:58 EDT; 20h ago
Main PID: 940 (nagios)
Tasks: 8
Memory: 9.7G
CPU: 9h 57min 22.607s
CGroup: /system.slice/nagios.service
├─ 940 /usr/local/nagios/bin/nagios /usr/local/nagios/etc/nagios.cfg
├─1067 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/rw/nagios.qh
├─1068 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/rw/nagios.qh
├─1069 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/rw/nagios.qh
├─1070 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/rw/nagios.qh
├─1071 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/rw/nagios.qh
├─1072 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/rw/nagios.qh
├─1747 /usr/local/nagios/bin/nagios /usr/local/nagios/etc/nagios.cfg
├─9205 /usr/local/nagios/libexec/check_nrpe -H *.*.*.* -c ****** -a ********
├─9210 /usr/local/nagios/libexec/check_nrpe -H *.*.*.* -c ***********
├─9211 /usr/local/nagios/libexec/check_dns -H ******************* -s *.*.*.*
└─9212 /usr/bin/nslookup -sil ***************** *.*.*.*