Michał mszczygiel

Install ARCH Linux with encrypted file-system and UEFI

The official installation guide (https://wiki.archlinux.org/index.php/Installation_Guide) contains a more verbose description.

Download the Arch ISO

Image from https://www.archlinux.org/

Copy to a USB drive

Akka Cluster Implementation Notes

Slightly disorganized but reasonably complete notes on the algorithms, strategies and optimizations of the Akka Cluster implementation. Could use a lot more links and context etc., but was just written for my own understanding. Might be expanded later.

Links to papers and talks that have inspired the implementation can be found on the 10 last pages of this presentation.

Akka Gossip

Gossip state

This is the Gossip state representation:

	# Install ARCH Linux with encrypted file-system and UEFI
	# The official installation guide (https://wiki.archlinux.org/index.php/Installation_Guide) contains a more verbose description.

	# Download the archiso image from https://www.archlinux.org/
	# Copy to a usb-drive
	dd if=archlinux.img of=/dev/sdX bs=16M && sync # on linux

	# Boot from the usb. If the usb fails to boot, make sure that secure boot is disabled in the BIOS configuration.

	# Set swedish keymap

	package playground.subtypes

	import shapeless._
	import scala.reflect.runtime.universe._

	final case class SubtypeName(value: String) extends AnyVal

	trait EnumerateSubtypes[A] {
	def subtypeNames: List[SubtypeName]
	}

	#!/bin/bash

	#controls backlight on intel cards,

	STEP=50

	function usage() {
	echo "usage: " `basename $0` " [--inc\|--dec]"
	}

	#!/bin/bash

	# example crontab entry:
	# /5 * * * mszczygiel /usr/local/bin/batcheck.sh

	BAT_PATH="/sys/class/power_supply/BAT0"

	ON_BATTERY=$(cat $BAT_PATH/status)
	BATTERY_LEVEL=$(cat $BAT_PATH/charge_now)
	BATTERY_FULL=$(cat $BAT_PATH/charge_full)

	import scalaz._
	import Scalaz._
	// https://functional.works-hub.com/learn/reverse-state-monad-in-scala-is-it-possible-62a2f
	object Playground extends App {
	final case class ReverseState[S, A](run: S => (S, A)) {
	def map[B](f: A => B): ReverseState[S, B] = ReverseState((s: S) => {
	val (next, a) = run(s)
	(next, f(a))
	})