This script and work was based on Cobootstrap for Debian. The following procedure assumes you have a running Ubuntu/Debian system to create the image. Access to the internet to download the base system install packages is required. From your Ubuntu/Debian system: Install the debootstrap utility sudo apt-get install debootstrap Save the above script into /tmp/cobootstrap, edit the UBUNTU_VERSION and CO_SIZE to your needs. You will get an image.gz that you can decompress and use with colinux. NOTE: The eth0 is setup to DCHP assuming you will be using slirp for the eth0 network.