Tutorials, guides and articles

Updated: 2020-11-19
A quick tutorial on how to extract private key and certificate from a PFX or PKCS #12 archive file into a format that, for example, Apache can use.
Updated: 2020-11-12
How to install OpenSSL 1.1.1 on older Linux distributions that does not provide it when working with Qt 5.12.4 or later.
Updated: 2020-03-10
Various tricks and tips for users of Raspberry Pis, mainly with Raspbian distribution. These tips and tricks grows over time.
Updated: 2019-12-10
Build OpenSSL for Qt Android on Linux with uptodate Android NDK using clang compiler. Both 1.1.1 for Qt 5.12.4 and later and 1.0.2 for older Qt versions are covered.
Updated: 2019-10-29
https://developer.nvidia.com/video-encode-decode-gpu-support-matrixBuild FFmpeg packages with hardware accelerated NVIDIA encoding & decoding support. Tested on Linux Mint.
Updated: 2019-04-30
How to quickly hide Drupal 7s automatic internal /node & /taxonomy pages without even hitting Drupal itself.
Updated: 2019-01-30
Raspbian based on Debian Stretch comes with an old (5.7.1) version of Qt that is already outdated and missing some features and modules. Afaik there are no up-to-date backports so the only way to get an up to date version version of Qt with all features enabled running on your Pi is to build it yourself.
Updated: 2018-04-12
How to install 64-bit kernel and configure the Raspberry Pi3 to boot it.
Updated: 2018-02-26
Instructions on how to prepare a Debian Raspbian for headless USB serial console use on a Raspberry Pi Zero, Zero W, A and A+ boards using USB OTG (gadget) mode. Note that these are the only models where it is possible to do so as they don't have a USB hub and the OTG mode is available for use.
Updated: 2018-02-23
Instructions on how to build Qt 5.8 on a Raspberry Pi running Raspbian Debian Jessie.
Updated: 2018-02-23
Instructions on how to build Qt 5.8 on a Raspberry Pi under Raspbian Debian Stretch.
Updated: 2018-01-18
Various examples on creating timelapse videos using gstreamer, from capturing to combining image files into a video.