Privacy on Cat in a Shell

Hugo Server Side Mermaid Rendering

Sat, 11 Jul 2026 14:03:00 +0200

This diagram is rendered during hugo build and served as a static svg.

Most websites just use the mermiad js library and let each user render the diagrams client-side. But this is a imo pretty trashy solution, since it requires each visitor to run javascript (which no one should do …; read more in my about section).

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How to make Hugo render Mermaid Diagrams during Build

In the end you can just write in your markdown files:

Redirector

Wed, 08 Jul 2026 18:45:34 +0200

A browser extension I once wrote that allows redirecting from one site to another one, following user specified rules. This can be used to e.g. auto jump from yt to the matching invidious video etc.

Stalwart Mail Alias Creation Script

Fri, 03 Jul 2026 22:18:38 +0200

I just run: al <name for the alias> and get a new mail redirecting all mails to my main inbox.

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Why?

You might want to hide your mail from websites where you register, as they might sell your mail address (which is then used to profile or spam you), they might get hacked and you get tons of spam, or they just spam you right away. An alias mail can be easily disabled and tada, finished, no more wories, no more mails from that address (and the site you gave it to) without having to change your whole mailbox …

Setting Up My Own Mailserver (Stalwart)

Thu, 02 Jul 2026 15:19:27 +0200

TLDR; Me renting about mail, you can skip to Options, if you don’t wanna read it, because you already know

Mail usually totally sucks, you register somewhere for free, like gmail or whatever, and need to provide tons of personal data + have them scan your mails (not sure if they openly admit it tbh, but I believe they do even if claimed otherwise…). Mails are horrible for privacy … They are often unencrypted (except if you set up PGP and your communication partner also uses it, but almost no one except in the privacy corner does so …). There are some providers who don’t ask you for as much, like Proton. Still it sucks, you can’t easily move provider etc. Lets say they decide to charge everyone one day … Or change their privacy policy, or make some controversal tweets … and you want to distance yourself from them.

RSS is Awesome!

Mon, 29 Jun 2026 10:17:52 +0200

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What is RSS?

Its a format for website feed, basically like a social media timeline for only the stuff the website wants to post there (one site can also have multiple feeds, like one per category etc.). So lets say you subscribe to NixOS Announcement Feed, whenever they write a new announcement post they also (automatically probably) create an entry in their rss feed.