Nagios is a monitoring system that tracks the availability and performance of network services, servers, and applications. Installing Nagios on Rocky Linux 9 enables users to run scheduled service checks for HTTP, SSH, disk usage, and system processes using plugins. Nagios Core is the central component of the Nagios system, responsible for executing monitoring checks, managing configurations, and handling notifications. Nagios Core triggers alerts if a service or host experiences an issue, such ......