joshgav

## 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