I have ubuntu server 16.04 with nagios installed and it works without problem, but when restarting the server does not start the service, I have to do it manually with the following command:
systemctl start nagios
I have reinstalled nagios 3-4 times and I always have the same problem. When I reach the last step:
update-rc.d nagios defaults
I get the following error:
insserv: script nagios is not an executable regular file, skipped!
I don´t know if we can find a solution.
Greetings and thank you.