F.J Kong BH1SCW

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

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:

Mac Uninstall pkg Manually

using pkgutil

# list all your installed packages
pkgutil --pkgs

# show your package info
pkgutil --pkg-info

	#!/bin/sh

	# https://www.topbug.net/blog/2012/03/17/generate-ctags-files-for-c-slash-c-plus-plus-source-files-and-all-of-their-included-header-files/
	# ./ctags_with_dep.sh file1.c file2.c ... to generate a tags file for these files.

	gcc -M "$@" \| sed -e 's/[\\ ]/\n/g' \| \
	sed -e '/^$/d' -e '/\.o:[ \t]*$/d' \| \
	ctags -L - --c++-kinds=+p --fields=+iaS --extra=+q

	# edit and save this file to /usr/lib/systemd/system/clash.service
	[Unit]
	Description=clash
	After=network.target

	[Service]
	WorkingDirectory="your home directory"/.config/clash
	ExecStart="your home directory"/.config/clash/start-clash.sh
	ExecStop="your home directory"/.config/clash/stop-clash.sh
	Environment="HOME=your home directory"

	#!/usr/bin/env bash

	# --slave /usr/bin/$1 $1 /usr/bin/$1-\${version} \\

	function register_clang_version {
	local version=$1
	local priority=$2

	update-alternatives \
	--install /usr/bin/llvm-config llvm-config /usr/bin/llvm-config-${version} ${priority} \

	1. general (rpm, speed, gear, time)
	2. engine load (actual + target)
	3. torque (actual + target)
	4. accelerator pedal angle
	5. throttle body angle
	6. boost (actual + target)
	7. wastegate duty cycle
	8. fuel trims (short term)
	9. fuel pressure (low + high)
	10. ignition timing (all cylinders + average)

	// LZ4 streaming API example 2 (ring buffer)


	#define _CRT_SECURE_NO_WARNINGS // for MSVC
	#include "lz4.h"

	#include <stdio.h>
	#include <stdint.h>
	#include <stdlib.h>
	#include <string.h>

	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

	#!/bin/sh

	RELAY="$1"
	PORT="$2"

	echo -n 'nat-hole-punch' \| socat STDIN "UDP-SENDTO:$RELAY:$PORT,sourceport=$PORT"
	mosh-server new -p "$PORT" \| sed -n 's/MOSH CONNECT [0-9]\+ \(.*\)$/\1/g p'