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Blog – Nicolas Kuttler

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I am Nicolas Kuttler, a freelance Computer Scientist, DevOps Expert and Technical Leader. more

Automation AWS Terraform Linux shell AI Vivaldi refactoring LLM Programming Docker Bahn Python Flask Xorg video Politics Inflation Bitcoin Money privacy television tv ini Networking bash security SSH mosh HashiCorp licensing open source free software Apple Vim Deployment Debian Home Assistant Kodi testing CI/CD Django Gajim QuodLibet email Thunderbird Firefox OMEMO Jabber encryption i3 music desktop Wagtail password Testnet SaltStack install howto ARM admin Kubernetes kernel emoji VNC nginx Tor Irssi PGP PHP WordPress caching OTP 2fa rsync backups geolocation fraud JavaScript git GNOME MATE google Amazon Kindle virtualenv continuous integration Fabric uptime YAML MySQL HTML StreamField CSS Android Weston Wayland SEO reputation management web analytics Jenkins reStructuredText Typography template CBV context rewrite hotlink init gunicorn cookies wget theme plugin custom taxonomy minify usability category autotag tag rant apache lighttpd jQuery ajax shortcode ext4 accents keymap openbox marketing advertising openx geotargeting targeting redirect duplicate content virtual hosts onclick onfocus

Featured content

- Stable Django deployments without downtime
- Update Django template fragment caches in the background
- Why do we actually have inflation?
- "Soft" and "hard" money
- Detecting fraudulent activity on a bitcoin testnet faucet
- Using django-tables2, django-filter and django-crispy-forms together
- My plugins featured in Web Designer Magazine



# Blog

## Starting EC2 fails with internal error from lambda or boto

2025-10-27

I tried to launch an EC2 instance using different methods, but boto and lambdas failed consistently with "Server.InternalError", but the machine could be started just fine from the command line or the web console. It took a while to figure out the problem: an encrypted EBS volume was attached, and … more

## OpenAI codex eternal 401 errors

2025-10-06

I tried to run the OpenAI command line tool codex, but at some point it started throwing 401 errors, and then rate limited me. I checked my environment variables, tried configuring API key permissions, created a new one, and other random stuff. My credit balance was positive, around $5, and … more

## Vivaldi shows "no passwords saved"

2025-09-29

Passwords and sync were broken on my Vivaldi for a while. Here's how I fixed it. more

## Workflows and project management for AI agents

2025-09-14

For the last two years, I had tried to solve non-trivial programming tasks with LLMs, but none could deliver anything that satisfied me. This changed a few months ago, and after some early successes and failures, I tried a more systematic approach and have established an AI assisted workflow that works well. more

## Docker and wifionice

2025-04-16

I've had enough. I needed to work, and needed to use docker, and the default docker network conflicts with the IP address on the wifionice network on the train. Well. Instead of stopping docker and cleaning up everything, why did I not simply reconfigure docker to use a different network? … more

## HTML response from flask API

2025-03-17

I was working on a personal project, a simple API using flask, and was annoyed that there was no dark mode when I opened endpoints for testing in my browser. The solution was rather simple, I added a jinja template for the HTML that contained the dark mode CSS in … more

## Vivaldi hidpi/4k scaling problems

2025-01-29

Vivaldi is one of the browsers I use, and recently it started to scale incorrectly on my 4k displays. Both menus and web sites were too large, gtk and web. The fix is pretty simple. more

## Stabilize video

2025-01-06

Just a small script I use to stabilize random videos. more

## "Soft" and "hard" money

2024-09-23

Humans have used money since time immemorial because barter is impractical. Over millennia time and again "harder" monies won out over others. But what does that actually mean? more

## Why do we actually have inflation?

2024-08-12

When I was a child, I saw the price of one scoop of ice cream rise from 10 to 15 or 20 cents. I was outraged, and then an older man told me that in his childhood a scoop of ice had only cost one cent. That shut me up and confused me entirely. more

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Latest updates

- Starting EC2 fails with internal error from lambda or boto
- OpenAI codex eternal 401 errors
- Vivaldi shows "no passwords saved"
- Workflows and project management for AI agents
- Docker and wifionice
- HTML response from flask API
- Vivaldi hidpi/4k scaling problems
- Stabilize video
- "Soft" and "hard" money
- Why do we actually have inflation?

Latest comments

- I met Bram only a few times but used his software for over 30 years. …
- Like the title of the post says, this is about private keys, not public ones.
- Well, for one you are not importing your public key. You are exporting your secret …
- Works for me
- I like this idea but could it cause any problems?

Copyright © 2003-2025 Nicolas Kuttler, Attributions