Quote Originally Posted by klaus2008
As far as I understand the code, one has to create an ordinary zip or tar.gz archive inside the running system and place this archive in the KNOPPIX directory. The archive will be extracted into /.

For example, I could run KNOPPIX from the live cd and make all the necessary changes. Then I would create the update-special.tar.gz archive with my configuration files which is copied to a flash device with an installed KNOPPIX on it. I would delete an existing persistent image and boot the system from that flash device. After the creation of a new persistent image I would get a KNOPPIX with my special configuration. (I tried this with a backup of may /home/knoppix and it worked fine.)
Sure. But if you run it on the living system, my understanding is that you will necesarily copy the whole UNIONFS structure, wherever you pick directories that are "mixed". (But of course I may be wrong.) How will that work out on updating? If you mount the image, non-running, and do the zipping you will at least get a somewhat smaller thing.. But will that blank out the UNIONFS part from the compressed image when it is unzipped? Haven't tried.