jottr jottr

Cents & Sensibility: The Ledger Luminaries' Revolution

I'm scared to account; scared of statements of business dealings, credits and debits, and tracking of all this money-related stuff. Scared of reciting these transaction histories, and yet reckoning with these computations and enumerations is as deathly certain as taxes.

It is silly that this problem has not been solved given fancy new technology like AI and large language models. It's also silly how much big institutions skim off the top, like 1.5–3.5% per credit card transaction, and our expanding web of subscriptions to Substacks, Youtubes and the like that become more numerous and Medusa-like the harder they are to track, aggregate, categorize, and analyze across instutitions. I'm also scared of Mint.com (I used it for many years) as they broker our data, but still need the help of software and technology to manage money. This feels like a data problem that should have been solved long ago 🤯

So the goal here was to spend a few hours on a weekend t

Demo

Xiaomi Redmi 2 with resolution 1280x720 (GUD RGB565 with compression)

9.mp4

10.mp4

Arch Linux ARM on Crostini

I got Arch Linux ARM installed on a Lenovo Chromebook Duet! I mostly used the instructions from the Arch Wiki as reference.

0. Before we begin

Thanks to the work of @agraf, @KhaosT, @imbushuo, and others, we have Virtualization.framework working on M1 Macs. These [changes][1] have been merged with QEMU v5.2.0 RC3 (will rebase once the final release is out) and integrated with UTM, a brand new QEMU frontend designed in SwiftUI for iOS 14 and macOS 11.

Downloads

Setting up NixOs with LUKS encrypted root

Here are my working notes on getting a system up and running.

WARNING: You can run into a hidden problem that will prevent a correct partition setup and /etc/nixos/configuration.nix from working: if you are setting up a UEFI system, then you need to make sure you boot into the NixOS installation from the UEFI partition of the bootable media. You may have to enter your BIOS boot selection menu to verify this. For example, if you setup a NixOS installer image on a flash drive, your BIOS menu may display several boot options from that flash drive: choose the one explicitly labeled with “UEFI”.

References

I used these resources:

Installing tmux-256color for macOS

macOS 10.15.5
tmux 3.1b

macOS has ncurses version 5.7 which does not ship the terminfo description for tmux. There're two ways that can help you to solve this problem.

The Fast Blazing Solution

Instead of tmux-256color, use screen-256color which comes with system. Place this command into ~/.tmux.conf or ~/.config/tmux/tmux.conf(for version 3.1 and later):

Linux Kernel Modules for NixOS

You can find what kernel modules are loaded using lsmod.

However some kernel modules are required at stage 1 boot. Basically preloaded in the initial ram disk before switching to the root filesystem. These kernel modules are mostly needed to deal with peripherals, storage devices, filesystems and network devices. You may need to be wary of these required modules:

sd_mod - SCSI, SATA, and PATA (IDE) devices

	# Debian 10
	apt-get -y update
	apt-get -y upgrade --without-new-pkgs
	apt-get -y full-upgrade

	cat > /etc/apt/sources.list <<"EOF"
	deb http://deb.debian.org/debian/ bullseye main
	deb-src http://deb.debian.org/debian/ bullseye main
	deb http://security.debian.org/bullseye-security bullseye-security/updates main
	deb-src http://security.debian.org/bullseye-security bullseye-security/updates main

	blueprint:
	name: Match Outside Colour Temperature Kelvin
	description: When a light turns on or the sun elevation changes match the outside
	colour temperature. It will apply to any bulb that supports color temperature.
	It triggers whenever a bulb turns on, on sun elevation changes and every 5 minutes.
	domain: automation
	input:
	target_lights:
	name: Lights
	description: The primary lights to be controlled

	set -x

	cat karabiner.yaml \| ruby -r yaml -r json -e 'puts YAML.load($stdin.read).to_json' \
	\| jq --sort-keys 'del(.definitions)' > karabiner.json