how to create a .zd file

Juliano Bittencourt juliano at
Wed Nov 18 16:05:40 UTC 2009

Hi Daniel,

Actually I've create .img for the XO-1 many times in the past. It was pretty
straightforward with the info in the wiki. I followed the same procedures
and got a .img for the 1.5 branch but no .zd. I will check out zhashfs
and bios-crypto.

Thanks a lot,


2009/11/18 Daniel Drake <dsd at>

> On Wed, 2009-11-18 at 16:48 +0200, Juliano Bittencourt wrote:
> > Hi all,
> >
> >      Sorry the newbie question, but how do I create a .zd file from
> > an .img? Here in Rwanda my internet is so slow that requires several
> > days to download a new image. The best solution is to build the images
> > locally keeping cache of the rpms. This allows that any changes be
> > done quickly. However I didn't found documented anywhere how to create
> > the file for fs-update.
> Isn't the first question "how do I create an image?" :)
> It's all in projects/fedora-xo in git, xo-1.5 branch. Makefile shows you
> how we make builds including all the outputs. You'll need to get the
> actual zhashfs tool from bios-crypto (also a git repo). Sorry that the
> build system is a bit messy and undocumented, I hope to find time to
> clean it up soon.
> Daniel
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