Krzysztof Wilczyński kwilczynski

QEMU arm64 cloud server emulation

This is basically a rehash of an original post on CNXSoft - all credit (particularly for the Virtio device arguments used below) belongs to the author of that piece.

Download the latest uefi1.img image. E.g. ubuntu-16.04-server-cloudimg-arm64-uefi1.img from https://cloud-images.ubuntu.com/releases/16.04/release/

Download the UEFI firmware image QEMU_EFI.fd from https://releases.linaro.org/components/kernel/uefi-linaro/latest/release/qemu64/

Determine your current username and get your current ssh public key:

Here is the best setup (I think so :D) for Keychron + Linux

Make Fn + F-keys work

Keychron Keyboards on Linux use the hid_apple driver (even in Windows/Android mode), both in Bluetooth and Wired modes. By default, this driver uses the F-keys as multimedia shortcuts and you have to press Fn + the key to get the usual F1 through F12 keys.

In order to change this, you need to change the fnmode parameter for the hid_apple kernel module. Here's some documentation on it, but a quick summary can be found below:

How to mount a qcow2 disk image

This is a quick guide to mounting a qcow2 disk images on your host server. This is useful to reset passwords, edit files, or recover something without the virtual machine running.

Step 1 - Enable NBD on the Host

modprobe nbd max_part=8

author: @sleepyfox
title: Fox's laws of software development
date: 27 October 2021
preamble: A not entirely serious treatise on the immutable fundamental laws of software development activities

Fox's laws of software development

A not entirely serious treatise

	apt install -y vim
	apt install -y wget

	apt install -y sqlite3 (used by a test, not needed for the build to complete)

	apt install -y curl
	apt install -y git
	apt install -y build-essential
	apt install -y pkg-config

	# Using these pry gems -- copy to your Gemfile
	# group :development, :test do
	# gem 'awesome_print' # pretty print ruby objects
	# gem 'pry' # Console with powerful introspection capabilities
	# # pick either:
	# # using byebug, but has issues with Zeitwerk
	# gem 'pry-byebug' # Integrates pry with byebug
	#
	# # using default ruby debuggger
	# gem 'pry-stack_explorer'

	class Terramate < Formula
	desc "Tool for managing multiple Terraform stacks"
	homepage "https://github.com/mineiros-io/terramate"
	# Disabled. No official release of Terramate yet.
	# url ""
	# sha256 ""
	license "Apache-2.0"
	head "https://github.com/mineiros-io/terramate.git", branch: "main"
	# Disabled. No official release of Terramate yet.
	# livecheck do

	>>> a = 975205316
	>>> b = 4096
	>>> (a + b) - (a % b)
	975208448
	>>> ((a + b) - (a % b)) + 64
	975208512
	>>> 975208448 % 4096
	0
	>>> a + (b - 1) & ~(b - 1)
	975208448

	dtparam=i2c=off
	dtparam=i2s=off
	dtparam=spi=off

	dtparam=uart0=off
	dtparam=uart1=off

	dtparam=audio=off

	dtoverlay=disable-wifi

	ARG go_version=1.17
	ARG alpine_version=latest

	FROM golang:${go_version}-alpine AS builder

	ARG GOOS=linux
	ARG GOARCH=amd64

	ENV GOOS=${GOOS}
	ENV GOARCH=${GOARCH}