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<script>
window.onload = function() {
  fetch('./swagger.json')
  .then(function(response) {
    response.json()
    .then(function(json) {
      json.schemes[0] = window.location.protocol.slice(0, -1)
      json.host = window.location.host

      const ui = SwaggerUIBundle({

rubensa

#!/usr/bin/env zsh

git show-branch -a \
| grep '\*' \
| grep -v `git rev-parse --abbrev-ref HEAD` \
| head -n1 \
| sed 's/.*\[\(.*\)\].*/\1/' \
| sed 's/[\^~].*//'

# How it works:

rubensa

#!/usr/bin/env bash

docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
docker buildx create --name multiarch --driver docker-container --use
docker buildx inspect --bootstrap

rubensa

set -e, -u, -o, -x pipefail

The set lines

• These lines deliberately cause your script to fail. Wait, what? Believe me, this is a good thing.
• With these settings, certain common errors will cause the script to immediately fail, explicitly and loudly. Otherwise, you can get hidden bugs that are discovered only when they blow up in production.

• set -euxo pipefail is short for:

set -e
set -u

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The repository for the assignment is public and Github does not allow the creation of private forks for public repositories.

The correct way of creating a private frok by duplicating the repo is documented here.

For this assignment the commands are:

1. Create a bare clone of the repository. (This is temporary and will be removed so just do it wherever.)

git clone --bare git@github.com:usi-systems/easytrace.git

rubensa

Available Wildcarded DNS Domains

It turns out that some kind hearted people already set up wildcarded domains for you already. You can use any top level domain below and any subdomain of these and they will always resolve back to 127.0.0.1 (your local machine). Here's the list of ones I know about. Let me know if there are more!

• 127-0-0-1.org.uk
• 42foo.com
• beweb.com
• domaincontrol.com
• feacebook.com
• lacolhost.com

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Enable PipeWire on Ubuntu 21.10

Ubuntu 21.10 has PipeWire partially installed and enabled as it's used by browsers (WebRTC) for recoding the screeen under Wayland. We can enable remaining parts and use it for audio and Bluetooth instead of PulseAudio.

This guide is only for original Ubuntu out-of-the-box packages. If you have added a custom PPA, you might get into conflicts.

Based on the Debian Wiki, but adopted for Ubuntu 21.10.

Install

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Configure systemd-resolved to use a specific DNS nameserver for a given domain

Use case

Given

• I use a VPN to connect to my work network
• I'm on a Linux computer that uses systemd-resolved
• I have a work domain called example.com
• example.com is hosted by both public and private DNS nameservers

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// uncheck-checkboxes.js
// https://gist.github.com/rubensa/5128d5c8b85eb82ca970d89222693128
// Chrome DevTools Snippet to click on an element and uncheck all contained checkboxes.
// Starting Firefox 72, you can import a Javascript file content in the console input with Ctrl + O (Cmd + O on macOS), as well as saving the console input content to a file using Ctrl + S (Cmd + S on macOS).
(function() {

  function uncheckCheckboxes(e) {
    e.preventDefault();
    e.stopPropagation();
    window.removeEventListener('mousedown', uncheckCheckboxes, true);

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Kubernetes Notes

Busybox Debug

kubectl run busybox --image=busybox:1.28 --rm -it --restart=Never -- sh

kubectl run test --image=alpine:latest --rm -it --restart=Never -- sh