Keywords: Supervision, Icinga, Nagios, Linux

Chapter 7. Advanced Topics
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## Chapter 7. Advanced Topics

Table of Contents

External Commands
Event Handlers
Volatile Services
Service and Host Freshness Checks
Distributed Monitoring
Redundant and Failover Network Monitoring
Detection and Handling of State Flapping
Notification Escalations
Escalation Condition
On-Call Rotations
Monitoring Service and Host Clusters
Host and Service Dependencies
State Stalking
Performance Data
Scheduled Downtime
Recurring Downtimes
Using The Embedded Perl Interpreter
Adaptive Monitoring
Predictive Dependency Checks
Cached Checks
Passive Host State Translation
Service and Host Check Scheduling
Custom CGI Headers and Footers
Modified attributes
Object Inheritance
Time-Saving Tricks For Object Definitions

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