meta: Alte Posts entfernt
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Jan Kremer
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---
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title: "Easter eggs of this Websites"
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date: 2023-09-19
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description: "What you can't see is what you GET."
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tags: [meta]
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draft: true
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---
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## .well_known
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As of [RFC ...]()
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### OpenID
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### Nostr
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## `curl` easter eggs
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There are famously [no easter eggs](https://daniel.haxx.se/blog/2021/12/06/no-easter-eggs-in-curl/) built into `curl`. That doesn't mean I can't make my own.
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I set up `txt` files to display QR codes, which you can access via `curl`. There is one for the homepage, which is kind of stupid because you have to type in the URL to get a QR code for that URL.
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```bash
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curl https://jankremer.eu/qr.txt
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```
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I also set up codes for my [crypto](/tags/crypto) addresses. Just add `.txt` to the URL. Same for my [avatar](/pharmacist-0.webp). Fun fact: the `.png` file is only half the size of the `.txt` version.
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```bash
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curl https://jankremer.eu/xmr.txt
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```
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```bash
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curl https://jankremer.eu/pharmacist-0.txt
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```
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I think you need to use a [nerd font](https://nerdfonts.com) for the QR code to show correctly.
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> Why?
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Just for fun.
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---
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title: Geheime Botschaften – Simon Singh
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date: 2023-09-09
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description: "Buchvorstellung"
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tags: [bücher]
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---
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Ich las vor kurzem das Buch _Geheime Botschaften. Die Kunst der Verschlüsselung von der Antike bis in die Zeiten des Internet_[^1] von [Simon Singh](https://simonsingh.net).
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Es stellt eine Einführung in die Geschichte der Verschlüsselung dar und ist für jeden, den das Thema interessiert, äußerst empfehlenswert.
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Daneben geht der Autor auch auf die "Entschlüsselung" antiker Sprachen wie der [Hieroglyphen](https://de.wikipedia.org/wiki/Hieroglyphen) und Schriften wie [Linear B](https://de.wikipedia.org/wiki/Linearschrift_B) ein.
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In den letzten Kapiteln des Buchs erklärt Singh zudem "moderne" Verschlüsselungsmethoden wie [RSA](https://de.wikipedia.org/wiki/RSA-Kryptosystem) und den [Diffie-Hellmann-Schlüsselaustausch](https://de.wikipedia.org/wiki/Diffie-Hellman-Schlüsselaustausch).
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Nur leider zeigt sich hier deutlich, dass das Buch bereit 1999 publiziert wurde und somit die letzten 24 Jahre der Kryptographie nicht erwähnt werden konnten.
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Dadurch finden sich Themen wie zum Beispiel das [Signal-Protokoll](https://www.signal.org/docs/), die damit einhergehende massive Verbreitung starker Verschlüsselung und Krypto-Währungen hier nicht wieder.
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Zum Glück kann man vieles davon selbst im Internet recherchieren.
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Update: Signal wird in Zukunft [quantumresistente Verschlüsselung](https://signal.org/blog/pqxdh) benutzen.
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[^1]: Originaltitel: _The Code Book. The Science of Secrecy from Ancient Egypt to Quantum Cryptography_
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---
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title: Nix on macOS
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date: 2024-03-14
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description: Moving from Homebrew to Nix. Mostly.
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tags:
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- nix
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---
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For about a year, I've been fascinated by [Nix and NixOS](https://nixos.org). I don't remember exactly what fascinated me at first, probably the possibility to setup and configure my system using a single file. A few weeks ago, I decided to give it a serious try.
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## Installation
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To be honest this is not my first time installing Nix on my machine. I tried the official Nix installer and the "old" way to use Nix which is basically the same as any other package manager. I didn't see the point of having two package managers so I uninstalled Nix quickly after.
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Then, a few weeks ago, I came across [this guide](https://nixcademy.com/2024/01/15/nix-on-macos/) and it instantly clicked with me. Having a single file in which I declare my complete system and then have it set up in a few minutes without rebooting is just infinitely cool. In Nix, this feature is called _flake_. The guide uses the [Determinate systems installer](https://github.com/DeterminateSystems/nix-installer) which sets up flakes by default. It also explains how to install Nix Darwin.
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## Nix Darwin
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Nix Darwin is a set of Nix modules that brings declarative configuration to macOS. It includes a bunch of options such as for the dock, Finder or the keyboard for example. It also gives the user basic configuration options for various programs. However I prefer to set up terminal based programs using [Home Manager](#home-manager) instead, because it supports even more programs.
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What I do use extensively is the [Homebrew](https://brew.sh/) module to install not only GUI (graphical user interface) apps from Homebrew, but also from the App Store.
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## Home Manager
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For everything else, from terminal based programs to their configuration, I use [Home Manager](https://github.com/nix-community/home-manager?tab=readme-ov-file). It includes a huge set of modules and allows me to setup every non-GUI program in a declarative way. Still, sometimes you have to configure the "traditional way", meaning in the original configuration language. But still, I much prefer this over my cluttered `.config` directory.
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## Nixvim
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In the process of writing my Nix configuration, I became unsatisfied with my Neovim setup. I used to use [LazyVim](https://www.lazyvim.org) but it felt more and more bloated and slow on my 9 year old machine. For some time I used [Helix](https://helix-editor.com/) which has great defaults, such as language server protocol (LSP) and fuzzy finder integration. I really think Neovim should go in this direction. Unfortunately it lacks some features to make it my main editor, mostly support for [Typst](https://typst.app/) which is already added to the `master` branch. It also lacks a plugin system, but given such great defaults, there isn't that big of a need for it. Helix also features its own set of motions, and although I think they are not bad, maybe even better than Vim motions, the latter are so ubiquitously implemented that I would essentially use both all the time.
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That's when I saw a video by _ThePrimeagen_ in which he recommended [Kickstart](https://github.com/nvim-lua/kickstart.nvim/tree/master), a minimal Neovim starter configuration mainly written by _TJ DeVries_. It almost everything you need to get started and has insanely great documentation.
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The only thing that bothered me was the use of [Mason](https://github.com/williamboman/mason.nvim) as a LSP package manager. For some people this might be the best way to install LSPs, but I don't understand why I would use a second package manager when I can just use Nix for everything. Helix has a list of supported LSPs and all you have to do is make sure they are in your `$PATH`.
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Luckily, others already had the same issues and decided to write [Nixvim](https://github.com/nix-community/nixvim). Nixvim is a NixOS / Nix Darwin / Home manager module that lets you configure Neovim (almost) entirely using Nix. It uses Nix as the plugin manager and has great defaults and documentation.
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I basically recreated Kickstart using Nixvim with some minor tweaks. It feels just as snappy as Helix and I love it.
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## Conclusion
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This is just the tip of the tip of the iceberg of what is possible with Nix. Next, I want to learn to write my own flakes to set up development environments. I should probably learn a bit of Nix language too. But to sum it up so far, I'm really happy and excited about this "new" way to manage my computer.
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---
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title: Obsidian
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date: 2023-12-25T11:34:38+01:00
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description: Friendship ended with Emacs, now Obsidian is my best friend.
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tags:
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draft: true
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---
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---
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title: RSS
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date: 2023-09-01
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description: "Feeds without fuzz."
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tags: [rss, meta]
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---
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## What is RSS?
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Originally, RSS stood for "RDF/Rich Site Summary" but was later changed to "Really Simple Syndication"
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RSS is a way to subscribe to a website.
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Whenever that website updates it writes its changes to a `XML` file.
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You can then read this XML file and see what changed at a glance.
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Many websites use RSS including YouTube, ~~Reddit~~ Lemmy, ~~Twitter~~ Mastodon, most news sites, and almost any blog out there.
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For many blogs, RSS is the main way to distribute new posts.
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RSS is experiencing a Renaissance at the moment:
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Many people are now seeing the damages done by algorithmic feeds and want to go back to purely chronological feeds.
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RSS provides a perfect infrastructure for this.
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## How to read RSS?
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First, you need a feed reader. On macOS and iOS I highly recommend [NetNewsWire](https://netnewswire.com).
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For terminal fans [Newsboat](https://newsboat.org) is the way to go.
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[Thunderbird](https://www.thunderbird.net/) is also a good choice but there are tons of programs that can read RSS feeds.
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That's bascially it. Now you need to add some feeds and you are ready.
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I recommend picking a reader that can also fetch the article without opening the browser and loading a ton of ads.
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Pro tip: You can export your subscibtions to a `OPML` file and import them into any RSS reader.
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## How to distribute RSS?
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This is the hardest question to answer about RSS as there are endless possibilities.
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The easiest way would probably be to use a service such as Mastodon that generates the feed automatically.
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If that platform isn't for you, WordPress is a good way to host a blog.
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I read about people setting up their own scripts that automatically update the feed for new posts.
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I use [Hugo](https://gohugo.io) which is a _static site generator_.
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It generates feeds automatically but lies somewhere between WordPress and writing your own scripts in terms of how tech savvy you should be.
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## How to find RSS?
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Go to a website you like, copy the URL and paste it into your RSS reader.
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Modern feed readers can find RSS feed on their own, you just have to provide a link to the site you want to subscribe to.
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If that is not the case, you could try adding `/index.xml` to the URL.
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Some sites, like this one, also link to their RSS feeds.
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Often those links are a the bottom of the website and are either marked as `RSS`, `Feed`, or just use the RSS logo.
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I additionally provide links to my subprojects such as my [microblog](/micro) or my [photos](/fotos).
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Feel free to add them to your reader.
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## Conclusion
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I think RSS is on the rise.
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It's an old protocol that survived numerous challenges
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It provides an escape from the algorithms and large social media companies.
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It also provides a way for content creators to distribute their content on their own without any middleman.
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