/usr/local/nagios/etc: This directory contains all configuration files related to the monitoring configuration.
/usr/local/nagios/var: This directory contains Nagios logs and all runtime data files such as
objects.cache. These files are commonly used by various Nagios add-ons as a data source.
/usr/local/nagios/libexec: This directory contains all of the Nagios plugins that can be run for the various host or service checks.
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