In this recipe, we'll take a look at the Tactical Overview screen of the Nagios Core web interface. Like its name implies, the screenshot on the following page provides a one-page summary of the current operating status of both the monitored hosts and services and the Nagios Core server itself.
You will need access to the Nagios Core web interface. In the default installation, the nagiosadmin user has the necessary privileges.
We can take a look at the Tactical Overview as follows:
Log in to the Nagios Core web interface.
Click on the Tactical Overview item in the left-hand side menu:
You should see the Tactical Monitoring Overview screen appear in the right-hand side frame:
Try clicking on some of the items under Hosts and Services, for example, the Up count under Hosts. Note that you're presented with a listing of all the hosts that comprise that section.
Return to the Tactical Overview, and try clicking on some of the items under the...
