Maybe some day in your Linux career you’ve heard of “tiling window managers”. I’ve (more or less) ignored them for many years, because I was happy with Gnome Shell and the “normal” way of handling applications on my screen. But when I started my new Linux job, there were no native Linux machine available for my work, so I had to use VirtualBox with its bad graphics performance. Using Gnome, KDE or any other Desktop environment was not really practical.

To get reasonable performance I needed a very lightweight windows manager with no effects and no other fancy stuff, so I ended up giving tiling window managers a try. Since then I’ve used i3 window manager at my job’s workspace. On my private laptop I chose for “Sway”, because it natively supports the Wayland window protocol (and I like Wayland ;-) ). Sway is quite similar to i3, e.g. basic window control keys are almost the same. Still there are some differences, such as configuration of keyboard and mouse.

In this article I’ll show you some parts of my personal Sway configuration and point out several tools that will be useful in your daily work. This is no complete guide which goes into details of installing every tool! Instructions for installation can be found on the projects’ websites.

▸ Read more

This how-to is based on my previous German how-to for Ubuntu 16.04 Server. Instead of using Spamassassin, Amavis, Pyzor and Razor as well es OpenDKIM, we’ll make use of Rspamd. Rspamd as a modern replacement will reduce the complexity of our setup and let us monitor its state via a web interface. As in earlier versions of my mailserver how-to, I’ll explain most important parts of the system as we install and configure them one after another. You will need basic Linux and command line knowledge to finish this guide. Going through this article will take probably about 45 minutes - depending on your speed and skills.

▸ Read more

In most cases running an own CA (certification authority) is not advisable. But there are exceptions: If you want to secure internal services of your company, using your own CA might be necessary. During my employment at ADITO Software GmbH I created a tool for X.509 certificate management. The root certificate of my tool had to be imported into every PC of the company. Unfortunately there are some pitfalls which I did not expect, but after some research I figured out how to import the new CA to Linux- and Windows PCs and to every major webbrowser.

▸ Read more