Christoph Dähne

Um einen Überblick über eine Software System zu vermitteln, wird häufig auf Schichten zurückgegriffen. Sandstorm Dependency Analysis (kurz sda) ist ein Open-Source CLI Tool um die Top-Level Struktur im Quellcode darzustellen und zu überwachen.

Here is my highly opinionated list of resources to learn development concepts “beyond if-else” applicable to multiple programming languages.

With docker-slim I reduced the size of my Docker image from 998MB to 92MB. Here I describe how to do that.

I want to share my experience with the open-source photo gallery HomeGallery suitable to host tens of thousands of photos on a Raspberry Pi for access with different screen-sizes (desktop computers and smartphone). I absolutely love it! The UI concept and the performance are great.

Subtle changes in the SQL queries and schema can have huge impacts on performance of the application. This is a showcase for one particular pitfall.

Writing an online Mandelbrot Set has been on my mind for quiet some time now. The code is meant to be a more complex "Hello World" WebAssembly program. After all: we must deal with complex numbers.

Let's install Pi-hole on your Raspberry Pi server (prior blog post) and let it eat ads. In this blog post I explain the installation and configuration of the Pi-hole and how to use it LAN-wide.

I walk you through my way of setting up a new Raspberry Pi as a server. Note that this is only one of many, many ways to setup a server. I choose this one because I find it easy and the result "good enough" to get started.

We are building our own 2 WAN gateway on a Banana Pi R2. I want to share my experience during the installation of the OS until the first SSH connection.

Quite some time ago we tried out BigBlueButton and we still use it today. Sometimes for full-fledged meeting with recording of session. Sometimes for opt-in video only when we talk via another tool. Now we decided to update to BigBlueButton 2.3 and install it on a new server with a fresh operating system.

At Sandstorm we use Mailcow. It comes with a very nice Web-UI both for administration and accessing mails, calendars and contacts. User can enable 2-factor-authentication which is great. One details caught our attention though: users can access the Web-UI via an unencrypted HTTP-connection. Here I want to explain how we fixed that.

Wie sieht golang aus? Hier findest du ein Mehr-als-Hello-World. Wenn man eine URL aufruft, sieht man wie oft diese bereits aufgerufen wurde. Ein Mini-Beispiel, um sich golang mal anzuschauen.