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
Step 2 - Connect the QCOW2 as network block device
qemu-nbd --connect=/dev/nbd0 /var/lib/vz/images/100/vm-100-disk-1.qcow2
Step 3 - Find The Virtual Machine Partitions
fdisk /dev/nbd0 -l
Step 4 - Mount the partition from the VM
mount /dev/nbd0p1 /mnt/somepoint/
Step 5 - After you done, unmount and disconnect
umount /mnt/somepoint/
qemu-nbd --disconnect /dev/nbd0
rmmod nbd
openexr error:
real commands
qemu-nbd --connect=/dev/nbd0 /mnt/sdb2/AndrewR/FreeBSD-13.0-RELEASE-amd64.qcow2
fdisk -l /dev/nbd0
mount /dev/nbd0p4 /mnt/zip -o ufstype=ufs2
qemu command:
qemu-system-x86_64 -hda FreeBSD-13.0-RELEASE-amd64.qcow2 -enable-kvm -smp 2 -hdb 5gb_ufs.qcow -m 1900
may be you need to manually activate swap in this image with swapon -a ?