Mount and Unmount QCOW2 images

Mount :- 

Install qemu-utils and enable ndb module

	sudo apt-get install qemu-utils
	sudo modprobe nbd

Connect the image to the first nbd device

	sudo qemu-nbd -c /dev/nbd0 xyz.qcow2
	
Mount the image. For nbd0, see all the devices available (/dev/nbd0<some-number-or-string>) and try attaching to starting from the first one

	sudo mount /dev/nbd0p1 /mnt/qcow1
	sudo mount /dev/nbd0p2 /mnt/qcow2...

Unmount :-

Unmount it.

	sudo umount /mnt
	
Disconnect the loopback device too	
	
	sudo qemu-nbd -d /dev/nbd0
	
Done!