Processing black & white film at home is easy. You just need a changing bag to load the film into a tank in darkness, and the rest can be done in the bathroom with the light turned on. The chemicals for black & white are normally used at 20°C but can be used at room […]
Read more "Processing colour C-41 films at home"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…
Read more "An unlikely correlation"I posted a few months ago to say that my server wasn’t a massive fan of the high temperature in my loft. Well, now it’s too cold. The UK has had a bit of a cold snap lately. Outdoor temperatures in Bristol last night got as low as -3 °C, and in turn the temperature […]
Read more "Baby, it’s cold outside"I recently (mid October) moved my home server into my loft, as its constant noise under my desk was getting on my nerves. However I found that with a large area of roof exposed to the sun (even the weak Autumn sun), and practically no ventilation the ambient temperature fluctuates enormously. In October when it […]
Read more "The temperature in my loft"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 […]
Read more "Various Nagios plugins"As I said in a previous post, I finally got my TEMPer USB thermometer to work on Fedora, thanks to a patch by Tollef Fog Heen that has now been incorporated into the Fedora kernel. I’m not familiar with C so I only made minor tweaks to Tollef Fog Heen’s code, which returns a temperature […]
Read more "Nagios plugin for TEMPer USB thermometer"Some time ago I bought a cheap USB thermometer called TEMPer. I was disappointed to find that it didn’t work on Fedora. It would only work on Windows using a poor piece of proprietary software. I eventually found the blog of Tollef Fog Heen, who had managed to get his TEMPer to work. Unfortunately his […]
Read more "TEMPer USB thermometer on Linux"