Tutorials, guides and articles

Extract key and certificate from PFX archive

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.

OpenSSL 1.1.1 and Qt 5.12.4

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.

Raspberry Pi tricks and tips

Updated: 2020-03-10

Various tricks and tips for users of Raspberry Pis, mainly with Raspbian distribution. These tips and tricks grows over time.

Build OpenSSL for Qt Android

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.

FFmpeg 4 with NVIDIA Encoding and Decoding support

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.

Hide Drupal internal pages

Updated: 2019-04-30

How to quickly hide Drupal 7s automatic internal /node & /taxonomy pages without even hitting Drupal itself.

Building Qt 5.10 for Raspberry Pi on Debian Stretch

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Raspbian based on Debian Stretch comes with an old (5.7.1) version of Qt that is already outdated and missing some features and modules.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.

Booting 64-bit kernel on Raspberry Pi 3

Updated: 2018-04-12

How to install 64-bit kernel and configure the Raspberry Pi3 to boot it.

Setup a Raspberry Pi for headless use with USB serial console

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.