Pavel Sayekat Pavel-Sayekat

How to resize a qcow2 disk image on Linux

This example takes olddisk.qcow2 and resizes it into newdisk.qcow2, extending one of the guest's partitions to fill the extra space.

1. qcow2 format

1.1. Verify the filesystems of `olddisk.qcow2`

FFmpeg cheat sheet

A list of useful commands for the ffmpeg command line tool.

Download FFmpeg: https://www.ffmpeg.org/download.html

Full documentation: https://www.ffmpeg.org/ffmpeg.html

Basic conversion

There are a few decent tutorials on how to setup hotspot on Linux, which I will share below, but this tutorial will focus on adversities that you without doubt will face while setting up your AP.

For AP setup we will need:

Hostapd utility
Some dhcp utility
A bit of patience (that was for my case)

How do I know that my WiFi adapter supports AP mode?

In terminal type sudo iw list this command will show info about your wifi interfaces. Look for Supported interface entry, if AP is in it, that means your Wifi devices support hotspot mode.

	$ modprobe bridge
	$ echo "net.bridge.bridge-nf-call-iptables = 1" >> /etc/sysctl.conf
	$ sysctl -p /etc/sysctl.conf

	sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-iptables: No such file or directory sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-ip6tables: No such file or directory

	# SOLUTION
	$ modprobe br_netfilter
	$ sysctl -p /etc/sysctl.conf

	#!/bin/env python
	import ctypes
	import struct
	import sys
	import os
	import array

	EFI_CAPSULE_GUID = "BD86663B760D3040B70EB5519E2FC5A0".bytes.fromhex() # 3B6686BD-0D76-4030-B70E-B5519E2FC5A0
	EFI2_CAPSULE_GUID = "8BA63C4A2377FB48803D578CC1FEC44D".bytes.fromhex() # 4A3CA68B-7723-48FB-803D-578CC1FEC44D
	UEFI_CAPSULE_GUID = "B9829153B5AB9143B69AE3A943F72FCC".bytes.fromhex() # 539182B9-ABB5-4391-B69A-E3A943F72FCC

	for svg in $(ls ./svg); do
	filename=$(echo $svg \| cut -d'.' -f1)
	convert -background none -density 1000 -resize 1000x svg/$(echo $filename).svg png/$(echo $filename).png
	echo [DONE] $filename converted!
	done

	// ImageMagick - Convert SVG to PNG w/ transparency
	//
	// - open terminal
	//
	// - confirm you have imagemagick installed
	// --- type: convert -v
	//
	// - cd to folder
	//
	// - single file

	# /usr/share/usb_modeswitch/2001:ac01

	# Run manually if required using:
	# usb_modeswitch -v 0x2001 -p 0xac01 -c /usr/share/usb_modeswitch/2001:ac01

	# D-Link DWM-222 A2
	TargetVendor=0x2001
	TargetProduct=0x7e3d
	StandardEject=1

	adb help // List all comands

	== Adb Server
	adb kill-server
	adb start-server

	== Adb Reboot
	adb reboot
	adb reboot recovery
	adb reboot-bootloader