Making OLPC Live CD.. (Part 1 and incomplete :)

[Bryan Berry]

Manish, great job

Let us know when you get the LiveCD booting.  Also, have you gotten a chance
to look at the Pilgrim code?
I'll try to play around w/ this tonight.

It would be great if we could get Pilgrim to successfully build LiveCDs.
That way we would could hand out LiveCDs to Windows and Mac geeks, and even
*gasp* non-technical people.  Of course there are some Mac geeks out there
who know how to use Parallels :) but I imagine they are in the minority.

I thought I tried the "-soundhw all" and "-soundhw" parameters each and it
didn't work for me.

Manish, were you able to hear audio output?  Now we need to test audio input
into vm instance, particularly dual audio inputs.  I would love to somehow
test audioconferencing b/w two vm instances on the same machine.  Not sure
how to best do that.




On 1/30/07, Manish Regmi <manish at olpcnepal.org> wrote:
>
>
> Hi all,
>   Here is how we can make Bootable CD of olpc image.
>
> 1) Get the lastest ext2 image from laptop.org (or from bryan :) ).
> 2) It is merely an image of the MBR partitioned Disk (CMIIMW here). to
> view the partitions contained in it type:
>     #  fdisk -lu olpc.img
>
>    You will see something like this:
>
> You must set cylinders.
> You can do this from the extra functions menu.
>
> Disk olpc.img: 0 MB, 0 bytes
> 16 heads, 62 sectors/track, 0 cylinders, total 0 sectors
> Units = sectors of 1 * 512 = 512 bytes
>
>    Device Boot      Start         End      Blocks   Id  System
> olpc.img1              62      985055      492497   83  Linux
>
>   It means that disk image has just 1 partition
>
> 3) Setup the loopback device for that partition using the following
> command:
>     # sudo losetup /dev/loop0 olpc.img -o $((62 * 512))
>        (note: 62 in above command which means partition 1 starts at sector
> no 62)
>
> 4) Mount the loopback device.
>     #  sudo mount /dev/loop0 /mnt/tmp
>
> 5) Now the partition is mounted in /mnt/tmp. Copy everything to a
> temporary location you can edit few things to make it bootable CDROM.
>
>     # mkdir ~/olpccd
>     # cp -rv /mnt/olpccd/* ~/olpccd
>
> 6) To boot the CD using grub we will need "stage2_eltorito" file. Copy it
> from your system to olpc grub folder.
>     # cp /lib/grub/i386-pc/stage2_eltorito ~/olpccd/boot/grub/
>
>     (Note:    it was in /lib/grub path in my ubuntu 6.10.
>         It might be at other place or not installed at all in your system.
>
>         The command "where grub" will give you hint. usually /lib or
> /usr/lib or /usr/local/lib.
>     )
>
> 7) You may also need to rename grub.conf to menu.lst. Also change the
> grub.conf/menu.lst so that it can load the kernel from cd.
>    change "(hd0,x)" to "(cd)"
>   also write give the path of kernel image not the symlink (
> /boot/vmlinuz- 2.6.19xxxx not just /boot/vmlinuz)
>
> 8) Now create the iso image
>     # mkisofs -R -b boot/grub/stage2_eltorito -no-emul-boot
> -boot-load-size 4 -boot-info-table -o olpccd.iso ~/olpccd
>
> 9) boot it and enjoy.
>
>
>
>
> After booting dont get angry. Because the above thing is not supposed to
> not load the root fs. For that we need to setup ramdisk and write a small
> program or shell script to get livecd booting.
> I am sleepy and tired for to day and will try that tomorrow. :)
>
>
> --
> --------------------------------------------------------
> Manish Regmi
> OLPC Nepal
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