Upgrading Graphite on Ubuntu 14.04 (0.9.12.3 -> 0.9.15)

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If you’ve installed Graphite from the default Ubuntu 14.04 (trusty) repositories, chances are you’ve got version 0.9.12-3 installe…

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Using LibreNMS for server OS monitoring, part 4: A simpler overview

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LibreNMS is excellent at graphing metrics. But sometimes, getting a quick overview of the health of all your devices can be a bit …

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Using LibreNMS for server OS monitoring, part 3: The aggregate CPU alert hack

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At the moment, LibreNMS only allows for triggering reliable alerts on single CPU devices. If a system has multiple CPU’s, and you …

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Using LibreNMS for server OS monitoring, part 2: Alert rules

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My greatest enemy is alert fatigue. Every time I receive a false positive alert from a monitoring system, I cringe. I try my best …

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Using LibreNMS for server OS monitoring, part 1: Basic configuration tweaks

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After being an Observium user for several years, I recently made the switch to LibreNMS, an open source fork of Observium. If you’…

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How to remotely enable/disable a LED on your Arduino using PHP and Processing

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Just got your first Arduino, but you don’t have any additional hardware? Gotten a little tired of watching the LED blink by itself…

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