Customized images

Carlos Dario Isaza Zamudio cdisazaz at gmail.com
Tue Jan 6 16:12:39 EST 2009


I'm sorry there was a misunderstanding on my part.

The idea with the images is for manufacturing the computers. In my state we
want to make a kind of customized image with some configuration and send for
manufacturing the computers.

Any ideas?

Thanks

Carlos Dario Isaza Zamudio::ConTi
Ingeniero Electronico
Proyecto Todos @l Computador
Celular (57) 300 814 9308
Universidad Nacional de Colombia - Sede Manizales
GNU/Linux Registered User #465475
eSSuX - Usuarios y Desarrolladores GNU/Linux UNAL Manizales


On Tue, Jan 6, 2009 at 3:52 PM, Erik Garrison <erik at laptop.org> wrote:

> On Tue, Jan 06, 2009 at 03:23:32PM -0500, Michael Stone wrote:
> >
> > On Mon, Jan 05, 2009 at 02:27:45PM -0500, Carlos Dario Isaza Zamudio
> wrote:
> > >I have a fully customized XO and i need to take an image from it to be
> > >installed on several computers inside the project. The thing is i need
> it to
> > >be separated from the activity pack, like the ones you use to update via
> > >USB.
> >
> > Hi Carlos,
> >
> > Thanks for the great questions.
> >
> > >Questions
> > >1) When i take the image from this one and install it into another, will
> i
> > >have two computers wchi are exactly the same?
> >
> > No. Each XO contains unique "manufacturing data", stored in a
> > non-volatile memory which is separate from the main (1GB) non-volatile
> > memory.
> >
> > Moreover, when you boot an XO, it runs some software which "dirties" the
> > filesystem. You'd want to "clean" the filesystem by undoing some of
> > these edits before you clone the image onto lots of other machines.
>
> Dirty might be too general a word.  Specifically there are a number of
> changes made to system files during the first boot of the machine
> which you might not want to copy between machines.  (SSH keys, for
> instance, are generated once at first boot on every XO.  Also,
> hardware-dependent information from the firmware is cached on the NAND
> after first boot.)
>
> We haven't worked on figuring out what pieces of the system are touched,
> so, as Michael notes, copying the machines can have unintended side
> effects.  It seems that nearly everyone who tries to distribute images
> by cloning runs into some oddities.  That said, it also seems that this
> method of customization is the most appealing and straightforward.  It
> has come up several times recently and I think the time has come to
> properly evaluate it.
>
> Erik
>
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