What Is Monitoring?

You monitor your Unix systems to make sure they are performing as they should. System monitoring assesses the performance of individual machines, to determine the status of, for example, remaining available disk space, CPU load, and network availability. Monitoring also assesses the performance of servers, to determine (for example) that mail servers are routing mail properly and Web servers are serving Web pages within acceptable standards.

Monitoring encompasses a variety of operations, including service checking, log analysis, and notification, but all of these functions are designed to identify two types of problems: those that the system is in danger of developing and those that the system already has developed. These ...

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