Since Oracle acquired Sun, people and blogs are asking what will happen to the OpenSolaris operating system. Oracle is a Linux company and supporting OpenSolaris too only costs extra money. I don't know. I don't care. But I care what happens with Sun's ZFS filesystem.

It took me a while to get it running: my Linux server as an Apple TimeMachine server for my MacBook running Snow Leopard (OSX 10.6). I couldn't get it to work, until I found the last piece of the puzzle: copy the correct Hardware UUID of my MacBook into a .plist file.

k10ctl is a tool to configure your Phenom II (K10) processor from a Linux commandline. You can use it to change the frequency and voltage of the CPU and NorthBridge for each 'powerstate'. It's a very powerful tool. However it's also a little hard, thus error prone, to use.

Cpufreq scales the frequency of your processor - if it supports it - according to the load. This technique is also known as frequency throttling. Intel calls it SpeedStep, AMD calls it Cool 'n Quiet. It can save a lot of power when the system is idle, thus ideal for your home server. But the features of cpufreq are a little bit limited. Cpufreqd extends those features by wrapping cpufreq. With cpufreqd (with a D) you can scale the frequency of your processor according to your server's conditions like (CPU) temperature, specific processes that are running... you can even overclock your system when you need the extra processing power!

This is my story about replacing a power efficient processor in my 24/7 Linux home server with a more power hungry one. And configuring it in a way it even consumes about the same amount of watts.... and and... still have it provide the performance when it needs to.

Zo, dus je hebt een leuke AMD Phenom II processor maar je ziet geen core temperaturen met bijvoorbeeld 'sensors'? De oplossing is er in de vorm van een k10temp module. In dit artikel een stap-voor-stap how-to.

Mijn server moet groener. Niet de kleur van de kast, maar zuiniger. Niet vanwege het milieu - fuck het milieu - maar vanwege de portomonee. Ik kwam er achter dat mijn server 150 watt verstookt, wat op jaarbasis zo'n EUR.280 kost. Dat moet minder. In dit artikel een beschrijving van mijn zoektocht naar een zuinigere server.

This one has cost me some minutes of Googling and trying before I found out how to... How to disable sudo logging to /var/log/messages and log to another file instead.

In some Linux distributions (like Ubuntu) there is a 2-second delay when typing a wrong password. It's a meaningless security measure against brute force attacks, because it justs causes any hackers to go multi-threaded. It annoys me, and if it annoys me I try to solve it.

Voel je je avontuurlijk en wil je Objective-C compileren onder openSUSE? Dat kan, de gcc compiler ondersteunt het gewoon, maar dat is niet genoeg.
In dit artikel een kort stappenplan.