Verifying configuration
In this recipe, we'll learn about the most basic step in debugging a Nagios Core configuration, which is to verify it. This is a very useful step to take before restarting the Nagios Core server to load an altered configuration, because it will warn us about possible problems. This is a good recipe to follow if you're not able to start the Nagios Core server at any point because of configuration problems, and instead get output similar to the following:
# /etc/init.d/nagios restart Running configuration check... CONFIG ERROR! Restart aborted. Check your Nagios configuration.
Getting ready
You should have a working Nagios Core 3.0 or better server running.
How to do it...
We can verify the Nagios Core configuration as follows: ...
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