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I was wondering if anyone knew of a good script or app that would monitor our vital metrics such as cpu and memory usage on our Red Hat Enterprise Linux ES 4 server.
We would like to set some thresholds so that a monitoring system alerts us (email, SMS) before the server goes down because of a process using too much memory or cpu.
It should be a really simple script, nothing with too many features, just the basics, but have the ability to log and alert several email addresses.
Thanks a bunch,
One popular one is called Nagios. There are plenty of others.
Here's the category listing on Wikipedia:
These typically use a "mangement server" running on some Linux system (but sometimes Windows is supported as well) which really shouldn't be one of the systems under management. An either mandatory or optional client ("agent") may be installed on each system under management. They usually also do some monitoring (such as pings) that doesn't require anything installed on the managed systems. In some cases, they don't use a client, but simply make an SSH connection and a command shell.