Chapter 01: Introducing Nagios

Chapter 02: Installing Nagios 4

Chapter 03: Configuring Nagios

Chapter 04: Using the Built-in Web Interface

Chapter 05: Using Additional Web Interfaces

Chapter 07: Advanced Configuration.

Chapter 08: Notifications and Events.

Chapter 09: Passive checks and NRDP.

Chapter 10: Monitoring Remote Hosts.

Chapter 11: Monitoring using SNMP.

Chapter 12: Advanced Monitoring.