Debian - Cloudimage

# cd /your/working/dir
ssh-keygen -o -a 100 -t ed25519 -C "User: installer, $(date '+%Y-%m-%d %H:%m')" -f installer

apt install libguestfs-tools -y;
wget https://cloud.debian.org/images/cloud/bookworm/latest/debian-12-generic-amd64.qcow2

virt-customize --install qemu-guest-agent -a debian-12-generic-amd64.qcow2
qm create 9001 --name debian-12-generic --memory 2048 --cores 2 --net0 virtio,bridge=vmbr0 --agent 1 
qm importdisk 9001 debian-12-generic-amd64.qcow2 local-lvm

qm set 9001 --scsihw virtio-scsi-pci --scsi0 local-lvm:vm-9001-disk-0
qm set 9001 --ide2 local-lvm:cloudinit
qm set 9001 --boot c --bootdisk scsi0
qm set 9001 --serial0 socket
qm set 9001 --ipconfig0 ip=dhcp
qm set 9001 --cpu cputype=x86-64-v2-AES

qm set 9001 --sshkeys installer.pub
qm set 9001 --ciuser installer

qm resize 9001 scsi0 32G
qm template 9001

qm clone 9001 999 --full --name debian12
qm start 999

rm -f /etc/machine-id /var/lib/dbus/machine-id
dbus-uuidgen --ensure=/etc/machine-id
dbus-uuidgen --ensure

rm -v /etc/ssh/ssh_host_*
dpkg-reconfigure openssh-server
systemctl restart ssh

host=dummyhost
domain=world.net

hostnamectl set-hostname $host
sed -i "s/127.0.1.1.*/127.0.1.1       $host.$domain $host/" /etc/hosts