Ebook: Nagios: System and Network Monitoring

Nagios is a host and service monitoring tool designed to inform systems administrators of network problems before clients or managers notice. Nagios makes it possible to continuously monitor network services (like SMTP, POP3, HTTP, NNTP, PING), host resources (such as processor load, disk and memory usage, running processes, and log files), and environmental factors (like temperature). Nagios: System and Network Monitoring, 2nd Edition is completely revised and expanded with over 200 pages of new material. Readers will find up-to-date coverage of the Nagios core and all standard Nagios plug-i.;I. From Source Code to a Running Installation -- 1. Installation -- 2. Nagios Configuration -- 3. Startup -- II. In More Detail ... -- 4. Nagios Basics -- 5. Service Checks and How They Are Performed -- 6. Plugins for Network Services -- 7. Testing Local Resources -- 8. Plugins for Special Tasks -- 9. Executing Plugins via SSH -- 10. The Nagios Remote Plugin Executor (NRPE) -- 11. Collecting Information Relevant for Monitoring with SNMP -- 12. The Nagios Notification System -- 13. Passive Tests with the External Command File -- 14. The Nagios Service Check Acceptor (NSCA) -- 15. Distributed Monitoring -- III. The Web Interface and Other Ways to Visualize Nagios Data -- 16. The Classical Web Interface -- 17. Flexible Web Interface with the NDOUtils -- 18. NagVis -- 19. Graphic Display of Performance Data -- IV. Special Applications -- 20. Monitoring Windows Servers -- 21. Monitoring Room Temperature and Humidity -- 22. Monitoring SAP Systems -- 23. Processing Events with the EventDB -- V. Development -- 24. Writing Your Own Plugins -- 25. Determining File and Directory Sizes -- 26. Monitoring Oracle with the Instant Client -- A. An Overview of the Nagios Configuration Parameters -- B. Rapidly Alternating States: Flapping -- C. Event Handlers -- D. Macros -- E. Single Sign-On for the Nagios Web Interface -- F. Tips on Optimizing Performance -- G. The Embedded Perl Interpreter -- H. What's New in Nagios 3.0?