mountqcow.sh

#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.

function mount-qcow2 () {
  modprobe nbd max_part=8
  qemu-nbd --connect=/dev/nbd0 "$1"
  fdisk /dev/nbd0 -l
  if [[ ! -d "$2"/nbd0p1 ]]; then
    mkdir "$2"/nbd0p1
  fi
  if [[ ! -d "$2"/nbd0p2 ]]; then
    mkdir "$2"/nbd0p2
  fi
  mount /dev/nbd0p1 "$2"/nbd0p1
  mount /dev/nbd0p2 "$2"/nbd0p2
}

function unmount-qcow2 () {
  umount "$1"/nbd0p1
  umount "$1"/nbd0p2
  qemu-nbd --disconnect /dev/nbd0
  rmmod nbd
}