## Install a necessary packages $ sudo apt-get install kvm cloud-utils genisoimage ## URL to most recent cloud image of 12.04 $ img_url="http://cloud-images.ubuntu.com/server/releases/12.04/release" $ img_url="${img_url}/ubuntu-12.04-server-cloudimg-amd64-disk1.img" ## download the image $ wget $img_url -O disk.img.dist ## Create a file with some user-data in it $ cat > my-user-data <<EOF #cloud-config password: passw0rd chpasswd: { expire: False } ssh_pwauth: True EOF ## Convert the compressed qcow file downloaded to a uncompressed qcow2 $ qemu-img convert -O qcow2 disk.img.dist disk.img.orig ## create the disk with NoCloud data on it. $ cloud-localds my-seed.img my-user-data ## Create a delta disk to keep our .orig file pristine $ qemu-img create -f qcow2 -b disk.img.orig disk.img ## Boot a kvm $ kvm -net nic -net user -hda disk.img -hdb my-seed.img -m 512