How to import Cloud Image to Virtual Machines on Debian 10

THIS IS A WORK-IN-PROGRESS.

YOU MAY BE EXPECTED TO SEE A CONSTANT CHANGES FOR NEXT FEW HOURS.

Download the latest Debian 10 cloud image in qcow2 format

$ curl -L -O https://cloud.debian.org/images/cloud/buster/latest/debian-10-genericcloud-amd64.qcow2
$ du -sh *.qcow2
223M    debian-10-genericcloud-amd64.qcow2

Reset root password on cloud image

You can ignore warning

You system might not have install virt-customize

To install virt-customize

$ virt-customize -a debian-10-genericcloud-amd64.qcow2 --root-password password:debian
[   0.0] Examining the guest ...
[  22.9] Setting a random seed
virt-customize: warning: random seed could not be set for this type of
guest
[  23.0] Setting the machine ID in /etc/machine-id
[  23.0] Setting passwords
[  26.9] Finishing off

Copy cloud image to default directory for libvirt

$ sudo cp debian-10-genericcloud-amd64.qcow2 /var/lib/libvirt/images/d10c.qcow2