In this chapter, we have learned how to use the notification mechanism more effectively by sending information about the host and service status using multiple protocols such as SMS or instant messaging. This can be used to reduce the number of e-mails sent and reduce the chances of failure information getting caught by spam or e-mail filters.

We have also learned about escalations, and how those can be used automatically to inform additional people when a problem has not been resolved in a timely manner. This can be especially important in large organizations or when there is no clear ownership of one or more resources.

The chapter also covered sending commands to Nagios and how that can be used to add information about hosts and services, scheduling checks, and changing custom variables.

We have also learned how to create event handlers and how those can be used automatically to attempt to restart a service and/or change notification settings.

The chapter also covered adaptive notifications...