In this chapter, we will look into common system health check techniques (private services) for Windows and Linux servers and network devices, along with their configuration, and setting parent-child relationships between Icinga hosts and services.
nagios-plugins package provides many check plugins for checking many common things. More plugins can be found online for specific use cases. Nagios Exchange (http://exchange.nagios.org/directory/Plugins) and MonitoringExchange (http://www.monitoringexchange.org/) are some of the very resourceful sources for useful plugins. Some plugins are even provided as distribution packages. It is required to install the