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Encrypted Btrfs storage setup and maintenance guide

Initial setup with LUKS/dm-crypt

This exemplary initial setup uses two devices /dev/sdb and /dev/sdc but can be applied to any amount of devices by following the steps with additional devices.

Create keyfile:

dd bs=64 count=1 if=/dev/urandom of=/etc/cryptkey iflag=fullblock
chmod 600 /etc/cryptkey

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

Ubuntu Noble Numbat

This is a placeholder for the 15th August 2024 release of Ubuntu 24.04.1

To start, read the official release notes.

If your install fits into "vanilla Ubuntu plus maybe a handful of 3rd-party repos", then this guide for a simple upgrade to Ubuntu 24.04 "Noble Numbat" from Ubuntu 22.04 "Jammy Jellyfish" can be helpful. 3rd-party repos are handled with a find command.

Some stats: - Total number of links: 23983

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Pasos para configurar Jest con TypeScript, en Node

Documentación oficial sobre Jest

Instalaciones de desarrollo (super test es útil para probar Express)

npm install -D jest @types/jest ts-jest supertest

	# To prevent unsuppoorted architecture error messages from apt on Ubuntu 24.04 (Noble Numbat)
	# with the new apt sources format

	# Example error messages on `apt update` after a fresh install:
	# N: Skipping acquire of configured file 'main/binary-i386/Packages' as repository 'https://packages.microsoft.com/repos/edge stable InRelease' doesn't support architecture 'i386'
	# N: Skipping acquire of configured file 'main/binary-i386/Packages' as repository 'https://dl.google.com/linux/chrome/deb stable InRelease' doesn't support architecture 'i386'

	#################################################
	### SINGLE-ARCH (i.e. fix arch-related error) ###
	#################################################

	// from: http://dis.4chan.org/read/prog/1295544154/170
	function sleepSort(list, callback) {
	const result = [];

	list.forEach((i) => setTimeout(() => {
	result.push(i);

	if (result.length == list.length) {
	callback(result);
	}

	import re
	from itertools import chain


	def calculate_readability(code_string:str) -> float:
	code = code_string.splitlines()

	# Heuristic 1: Line length
	max_line_length = 80
	long_lines = sum(1 for line in code if len(line) > max_line_length)

	import asyncio
	import random


	class Hub():

	def __init__(self):
	self.subscriptions = set()

	def publish(self, message):

	For a more organised and more update list please visit https://github.com/RayZz-/LCU-Arguments
	This list will no longer be updated please refer to the repo linked above


	These are known command line arguments for the LCU(including helper) some maybe outdated
	or overtime may become outdated or some information maybe incorrect
	if you would like to contribute please comment with updated information.
	Usage example:
	--app-name=kappa