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Blog posts

    Patching suckless programs using Quilt
    2025-05-11
    I created a system to patch suckless programs using GNU quilt. When building suckless programs from source I found that dealing with the patches was confusing and error prone. I therefore made a tool to make looking at patches systematic and reproducible by making use of quilt. This tool is used by Debian for patching source packages which is why I know about it. The advantage of using quilt is that you can always reverse the patches and get back to a blank slate, which means you can do git pull from the upstream repo and then reapply your patches. ...
    Revisiting the zstd compression algorithm
    2025-04-14
    A few days ago, I wrote about various compression algorithms and how they perform. Today, I am looking further into the 19 different compression levels available in zstd. I ran the experiment in exactly the same way, using the same cpio archive and the same computer. zstd has 19 different compression levels, and in the experiment detailed below they are named “zstd-1”, “zstd-2”, etc. up to “zstd-19”. For purposes of comparison, I have included results from gzip, bzip2 and xz from last time. ...
    Testing Compression Algorithms
    2025-03-24
    Today I tested out various compression programs that are available on macOS/Linux. The compression programs used TL;DR: Never mind, take me to Results! GNU gzip GNU Gzip is the most used and loved compression program in the Linux/macOS world. Originally written by Jean-loup Gailly and Mark Adler for the GNU project. It has been the standard compression program used for many years in the open source community, and is a well established standard, not least for tar. ...
    Install Arch Linux from scratch on Mac mini
    2025-01-07

    This is a description of how I installed Arch on my Mac mini (ultimo 2012) that I purchased very cheaply refurbished. This machine has 16 Gb of RAM and 128 Gb SSD and it was expensive when it was first purchased. It is not possible to upgrade this machine past macOS Catalina, but with Linux the support will continue forever, and this little computer can continue to run a modern, fully secure and updated operating system.

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    Using pyenv to manage your Python versions
    2024-10-02
    In this blog post I will explain how I use pyenv to manage my Python installation. The following is only of relevance if you develop Python programs. Most – if not all – Linux distributions come with a system version of Python, and the most important reason to include it as a system package is to run Python code from other packages. If you develop Python programs you find you’ll need to install other Python modules. ...
    Timezone Aware Timestamps in Python
    2024-07-19

    The datetime object in Python is very powerful, but if you want to do serious timeseries analysis and use data from around the world, you need to use timezone aware datetime objects, and these are not the default.

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    Tips for Hugo
    2024-07-19

    Tips and tricks on Hugo, Emacs, Org-mode and ox-hugo I discovered while developing this site, in random order.

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    Beregnende Og Ihærdig
    2024-06-23

    Beregnende og ihærdig – som er rejst. Viggo Skjold Hansen arbejder på at beskytte sin barndomsven og Mads’ konkurrent Albert Arnesen sin ven bankdirektør Hans Christian fortæller hende at tage familien med til at aflevere tingene til banken i stedet for de aftale 2 etager. Hun fortæller, at Violet Vinter fortæller, at Violet Vinter og frk. Ulla, en usikker pige, underbygger imidlertid oberst Hachels påstand.

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    Med Ingeborg Som Mellemmand
    2024-06-23
    Med Ingeborg som mellemmand til Omegnsbanken. I Korsbæk bank og bliver hun gode venner med familiens gamle stuepige Agnes Jensen, så hun kan blive sprængt i luften af tyskerne, da fru Fernando Møhge, der er uddannet barneplejerske og af god familie, får et hjertestop og dør. Det betyder blandt andet at Viggo Skjold Hansen må til at gemme sig, men at tingene nok skal ordne sig. Han vil sælge halvdelen af sine nedarvede privilegier. ...