Learning Nagios 4 (2014)
Chapter 2. Installing Nagios 4
Chapter 3. Using the Nagios Web Interface
Chapter 4. Using the Nagios Plugins
Chapter 5. Advanced Configuration
Chapter 6. Notifications and Events
Chapter 7. Passive Checks and NSCA
Chapter 8. Monitoring Remote Hosts
Chapter 9. Monitoring using SNMP
Chapter 10. Advanced Monitoring
Chapter 11. Programming Nagios
Chapter 12. Using the Query Handler