?Building a new KNOPPIX/boot.img

[BillS]

I need to re-construct the boot.img file used during the CD boot. I searched the forums for 'boot.img' and read all those. I read through http://www.knoppix.net/docs/index.php/KnoppixCustomKernelHowto.
I am not running M$Win, I am not installing a new kernel or ISOLinux. I have the boot.img opened through a /dev/loop and have modified files. Unfortunately it looks like loop is read-only. So I copy these to a HD directory, make changes, and then what?

root@knop1:/bld/newstuff# ll bootimg/
total 1402
-rwxr--r-- 1 root root 107 Nov 19 15:28 boot.msg
-rwxr--r-- 1 root root 1791 Nov 19 15:28 f2
-rwxr--r-- 1 root root 256 Nov 19 15:28 german.kbd
-r-xr--r-- 1 root root 7836 Nov 19 15:28 ldlinux.sys
-rw-r--r-- 1 root root 9258 Jan 8 08:29 logo.16
-rwxr--r-- 1 root root 489495 Nov 19 15:28 miniroot.gz
-rwxr--r-- 1 root root 2797 Jan 8 08:27 syslinux.cfg
-rwxr--r-- 1 root root 921593 Nov 19 15:28 vmlinuz

Note modified files. Now what is the 'mkisofs' command to rebuild the boot.img file? Then I will put it back into the remastering structure.

Thanks in advance

BillS

[Stephen]

I need to re-construct the boot.img file used during the CD boot. I searched the forums for 'boot.img' and read all those. I read through http://www.knoppix.net/docs/index.php/KnoppixCustomKernelHowto.
I am not running M$Win, I am not installing a new kernel or ISOLinux. I have the boot.img opened through a /dev/loop and have modified files. Unfortunately it looks like loop is read-only. So I copy these to a HD directory, make changes, and then what?

root@knop1:/bld/newstuff# ll bootimg/
total 1402
-rwxr--r-- 1 root root 107 Nov 19 15:28 boot.msg
-rwxr--r-- 1 root root 1791 Nov 19 15:28 f2
-rwxr--r-- 1 root root 256 Nov 19 15:28 german.kbd
-r-xr--r-- 1 root root 7836 Nov 19 15:28 ldlinux.sys
-rw-r--r-- 1 root root 9258 Jan 8 08:29 logo.16
-rwxr--r-- 1 root root 489495 Nov 19 15:28 miniroot.gz
-rwxr--r-- 1 root root 2797 Jan 8 08:27 syslinux.cfg
-rwxr--r-- 1 root root 921593 Nov 19 15:28 vmlinuz

Note modified files. Now what is the 'mkisofs' command to rebuild the boot.img file? Then I will put it back into the remastering structure.

Thanks in advance

BillS

Why not use Knoppix Customize (http://hydra.hq.linuxtag.net/~kester/knoppix-customize/) and have it do what you want without remastering at all?

[BillS]

I looked at that program/procedure. It showed me how to process my new boot graphic. But it is constrained to smaller than what is already there.

I am already re-mastering for my basic application, so I just need to re-build that file. I have all the pieces already pulled apart as part of the pseudo-CD I use for testing before burning....

BillS

[matt_w_lambert]

i got this from a remastering how to hope it helps



** #cp /KNOPPIX/boot.img /mnt/hda3
*Mount the image as follows
* * * #*mount -t msdos -o loop * /mnt/hda3/boot.img */mnt/hda3/image
* Now look in the image directory you created. There are a number of interesting *files in this directory

**** Boot logo **
logo.16 is the image displayed on boot screen. *It is encoded in a special format. For replacing it grab a 640*400 *16 color image. I downloaded an image from gnu.org.*Convert the image to a png file ( call it logo.png)*


** #pngtopnm <logo.png >logo.pnm

* *** #ppmtolss16 <logo.pnm >logo.16

*** # cp logo.16 /mnt/hda3/image/logo.16

[arkaine23]

skip this part- -t msdos

and you can write the files.

Don't skip it an you'll need to cp the files ouitside of the mounted loop, edit them, mv a non-essential file like logo.png outside the mounted loop, then cp the editied config files back in, then mv the non-essential logo.png back in the loop (it will be a tiny bit smaller probably), then unmount the loop.

[L2Cache]

I put a custom boot image on a knoppix cd using instructions from this page under custom boot cd:
http://www.cclug.org/wiki/Main/KnoppixTricks

[BillS]

Folks;
I want to thank you all for the help. On Friday I had the boot image change, but couldn't figure out why. I had done the cloop mount and say the files. I copied in a new image (appropriately processed), but the size of the file didnt' change.

Since that didn't work I went on to other tasks. I did *NOT* unmount the looped directory. Apparently the changes are not written out (or at least visible) until thing are flushed or unmounted. Later I shutdown to test a burn, which registered the new image which I found in the subsequet burn.

Thanks again for confirming what had happened. I am looking forward to moving on in this project.. Individual burn dates and serial numbers
incremented on the boot screen with each remastering

BillS