6:56 p.m.
Douglas McClendon <dmc.fedora(a)filteredperception.or wrote:
If that doesn't help or answer you question, try to add more
detail to
your question.
Douglas -
Thanks for the reply.
I use the live usb tools to create my live USB stick with a 2047 MB
overlay. I boot from it and let it run updates. I reboot the LiveUSB to
make sure it still boots, then I shut down. I boot a system on a copy of
Fedora 9 on the hard drive and plug in my Live USB so I can see the files
on my USB stick.
I see 2 folders:
LiveOS
and
syslinux
in the LiveOS folder I see three files:
osmin.img
overlay-FEDORA-3099-53F2
and
squashfs.img
======
assumptions
squashfs.img looks to be the size of the live iso
overlay-FEDORA-3099-53F2 looks to be the size of the overlay and has
overlay in the file name
osmin.img is only 8k probably a boot strap, I'm not sure.
=======
I'm sorry, I can't find anything on the LiveUSB file structure on the
WiKi. I've signed on as a writer for the Fedore project so I'd like to
write it once I figure out what it is.
I was hoping that I could backup the overlay file and the syslinux folder
from my completely updated LiveUSB stick and restore them to a newly built
LiveUSB from my backup.
I'm not entirely sure what you mean. One thing that is possible
is to
copy the overlay file from one liveusb and put it on another. Though
the format of the overlay file is inherently tied to the specific liveos
it was originally with. I.e. you won't be able to copy an
overlay file
from an f9-x86 liveusb onto an f9-x64 or f10-x86 liveusb. Or even a
customized f9-x86 liveusb that you created with livecd-creator/tools.
Nothing fancy - The same USB stick, built in the same way with the same
iso and the same overlay size.
The overlay file name changes. I've given the updated file (the overlay
that was part of the LiveUSB for all of the updates) the same name as the
new file that is created and left the updated file with its original name.
I've overwritten just the overlay itself and the overlay and every
combinarion of the osmin.img and squashfs.img files.
I could never get it to boot. The boot starts but then hangs.
Ideally, it would be great to specify the overlay and the syslinyx folder
that goes with that overlay in the command line to build the LiveUSB.
At this point I would be thrilled if I could get a set of manual steps
together to have an updated system without going through the update
process. I loose a day each time.
From an engineering standpoint, of course anything is possible. One
use case I see, is to use the persistence feature to add an entry to
fstab, such that say, /mnt/data mounts to a ext3fs image located on a
file on your liveusb. You can then add a user that has a home directory
under there, and perhaps install applications under there. In this
way,
you could then copy that ext3fs image file to an f10 liveusb, and
then
only have to re-do the fstab and passwd modifications, such that
everything now pretty much looks the same.
Your suggestion of building a file structure that would transcend
different releases would be awesome but alas I need to crawl before I can
run.
Any help would be greatly appreciated.
Thanks again
Martin
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