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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

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#!/usr/bin/env python

"""

Print (and write to JSON file) system information in a cross-platform manner.

Output contains information about platform, BIOS, CPU, memory, disk, GPU, network, peripheral devices, installed
packages, motherboard and users.

This script heavily relies on psutil and some other bash/powershell commands. See requirements.txt for dependency list.

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tmux shortcuts & cheatsheet

start new session with specified name:

tmux new -s mysession

attach:

tmux a  #  (or at, or attach)

attach to named:

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Get the Release.key
https://getfedora.org/keys/obsolete.html

rpm --import /tmp/Release.key
or
rpm --import https://getfedora.org/static/FB4B18E6.txt

Enable the Fedora19 repo (NOTE: obsolete/archived)
vi /etc/yum.repos.d/f19.repo

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How do I dropdown?

This is how you dropdown.

<details>
<summary>How do I dropdown?</summary>
<br>
This is how you dropdown.

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#!/bin/zsh -e

cd ~/tmpfs
mkdir -p .lxc-root .lxc-data/etc .lxc-data/home/lilydjwg/{.vim,.cache} .lxc-work

sudo GDK_DPI_SCALE=$GDK_DPI_SCALE zsh -e - <<'EOF'
modprobe overlay
mountpoint .lxc-root || mount -t overlay -o lowerdir=/,upperdir=$PWD/.lxc-data,workdir=$PWD/.lxc-root overlayfs $PWD/.lxc-root

# .lxc-root/etc/resolv.conf is protected

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#!/bin/bash

# You must accept the Oracle Binary Code License
# http://www.oracle.com/technetwork/java/javase/terms/license/index.html
# usage: get_jdk.sh <ext> <jdk_version>
# ext: rpm
# jdk_version: default 8

ext=rpm
jdk_version=8

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Let's say you have an iOS project, and you want to use some external library, like AFNetworking. How do you integrate it?

With submodules

Add the project to your repo:

git submodule add git@github.com:AFNetworking/AFNetworking.git Vendor/AFNetworking

or something to that effect.

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Setup armv7h chroot under x86_64 host (Archlinux/Archlinuxarm biased)

Simple way to setup an arm chroot for building packages for your arm devices. This is an alternative to cross-compiling where you are limited to only linking against the libs in your toolchain.

Setup chroot-fs

You can store the chroot wherever you like. I choose to store it in a disk-image which I mount to my filesystem.

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#!/bin/bash

el_version="6"
kernel_major="2.6.32"
kernel_minor="279.5.1"
vz_major="042stab061"
vz_minor=".2"

echo "Fetching OpenVZ Repo..."
cd /etc/yum.repos.d