If the project you're working on has, say, 39 repositories and counting in GitLab and you need all the...

If you need to convert an SVG source to PS or EPS, the most common suggestion on the interwebs is...

If your postgres database is only accessible from inside a kubernetes cluster, e.g. if it's configured in AWS RDS...

Here's a one-liner to view base64 encoded secrets in kubernetes. Make sure you have jq installed.

Working with a self-signed certificate is much easier, when the browser accepts it. Google Chrome Warnings from chrome might...

Sometimes the need arises for SSL in local development. We have guides for different webservers, this one is for puma...

These are the results of the "personal tech stack survey". I've included only the most popular mentions, maybe it...

This should be fixed in the latest LTS-branches of our mysql2 fork, 0.2.x-lts and 0.3.x-lts...

There's a simple way in bolt to run commands from a file without caring about BASH escaping: # /home/user/foo.sh

While working on a Rails application, your code base will grow a collection of different file types including: Ruby (business...

In our monitoring, RabbitMQ queues like aliveness-test may show up as unresponsive, with a ping timeout after 10 seconds...

DevOps Curriculum

Based on the Ruby Basics Card in the developer Curriculum Ruby is the programming language we use on the backend...

Instead of using Puppet exported resources you can use the puppetdb_query feature. This can result in more complex code...

Recent IRB versions include a multi-line autocomplete which may be helpful to novice users but can be distracting.

It might sometimes be useful to check whether your Rails application accesses the file system unnecessarily, for example if your...

Testing file download links in an end-to-end test can be painful, especially with Selenium. The attached download_helpers.rb provides...

Code quality can be measured in four levels: (Working code) Reliable code (minimum) Readable code (ok for short-lived code...

DevOps Curriculum

Der Begriff systemd wird immer umfassender da es sich nicht mehr (wie ursprünglich) nur um ein init Systemd handelt, sondern...

DevOps Curriculum

Linux Kernel Parameter werden üblicherweise schon zur Compile und Startzeit mit brauchbaren Default-Werten geliefert. Allerdings muss man, je nach...

makandra dev

You'll need openssl-3 or newer for servers running 22.04 Ruby version 3.1 uses by default the gem openssl...

DevOps Curriculum

Du kannst folgende Fragen beantworten: Was ist SSH, wie funktioniert es, auf welchem IP-Protokoll baut es auf, auf...

Unter Linux gibt es mehrere Dateisysteme. Es ist gut einen Überblick zu haben welche existieren und wie man die Dateisysteme...

DevOps Curriculum

In diesem Kapitel wollen wir uns die Struktur des Linux Dateisystems ansehen. Damit ist in diesem Fall nicht das Dateisystem...

There is a way to use multiple databases in Rails. You may have asked yourself how you're able to...