An unlikely correlation

I just spotted that my Nagios/RRD graphs of my home server are showing a strange correlation. From these graphs, it seems that the higher the outdoor temperature, the more free memory the system has available. I’m sure this is just a coincidence, though…

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Various Nagios plugins

I’ve now written several Nagios plugins and submitted them all to MonitoringExchange. Here’s a quick summary: check_temper for monitoring the temperature with a TEMPer USB thermometer check_kernel for checking that the currently running kernel on an RPM-based system is the most recent installed kernel (not necessarily the latest available kernel in the repository) check_aql_balance for […]

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SMS alerts with Nagios

In a previous post I mentioned how easy it is to increase functionality in Nagios. Today I was asked to set up SMS alerts in Nagios, as well as the existing email alerts. I am by no means the first person to write about this, but this post is intended to be a start-to-finish guide, […]

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On Nagios

The things I’m about to say will almost certainly be common knowledge to anyone who has used Nagios before, but I’ll say them anyway. In short, Nagios is a network/server monitoring tool. It’s web based and can monitor almost any network device. It comes with dozens of modules included, to monitor things with something as […]

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