Tuesday, August 09, 2005


remastering knoppix 3.9

You will need cloop I have used
To build it on linux 2.6.x arrange the Makefile, comment out:
include $(KERNEL_DIR)/conf.vars
and add -O2 to CKERNOPS

In advancecomp-1.9_create_compressed_fs/advfs.cc comment out:
#include <netinet/in.h>

compressed_loop.c needs the following patch:
--- compressed_loop.c.org 2005-08-09 18:23:27.000000000 +0200
+++ compressed_loop.c 2005-08-09 18:24:44.000000000 +0200
@@ -202,7 +202,7 @@
unsigned long offset, unsigned long size)
char *kaddr;
- struct clo_read_data *p = (struct clo_read_data*)desc->buf;
+ struct clo_read_data *p = (struct clo_read_data*)desc->arg.buf;
unsigned long count = desc->count;
if (size > count) size = count;
kaddr = kmap(page);
@@ -228,7 +228,7 @@
read_descriptor_t desc;
desc.written = 0;
desc.count = size;
- desc.buf = (char*)&cd;
+ desc.arg.buf = (char*)&cd;
desc.error = 0;
#ifdef REDHAT_KERNEL /* Greenshoe Linux */
do_generic_file_read(f, &pos, &desc, clo_read_actor, 0);

Build it:
make KERNEL_DIR=/home/jfclere/KERNEL/linux-2.6.10

Insert it in system:
/sbin/modprobe zlib_inflate
/sbin/modprobe zlib_deflate
/sbin/insmod cloop.o file=/home/jfclere/tmp/knx/master/KNOPPIX/KNOPPIX
Mount it:
mount -r -t iso9660 /dev/cloop /mnt/test2

Copy the KNOPPIX/KNOPPIX contents (from the
KNOPPIX_V3.9-2005-05-27-EN.iso) in one directory. (for example use cp
-Rp /mnt/test2/* KNOPPIX). That takes a while ;-)
Arrange the files (remove and add) in the directory and rebuild the
compressed file system with mkisofs for example:
mkisofs -R -U -V "KNOPPIX.net filesystem" -publisher "KNOPPIX
www.knoppix.net" -hide-rr-moved -cache-inodes -no-bak -pad /home/jfclere/tmp/KNOPPIX | nice -5 /home/jfclere/tmp/cloop-2.01/create_compressed_fs - 65536 >

Copy the KNOPPIX from the orignal iso image and replace the file
KNOPPIX/KNOPPIX by the new one (/home/jfclere/tmp/KNOPPIX/KNOPPIX here).

Build the iso image:
(cd /home/jfclere/tmp/knx/master
mkisofs -pad -l -r -J -v -V "KNOPPIX" -no-emul-boot -boot-load-size 4 -boot-info-table -b boot/isolinux/isolinux.bin -c boot/isolinux/boot.cat -hide-rr-moved -o /home/jfclere/jfc.iso /home/jfclere/tmp/knx/master

Monday, August 01, 2005


booting lunix on "strange" machines (using one floppy)

Boot knoppix (on a machine with a bootable CD drive).
In a console format and create the boot floppy using the following commands:
mkfs.ext2 /dev/fd0
fsck -f -t ext2 /dev/fd0
mkboot -d /dev/fd0
That doesn't work.... Too big!!!

Build a kernel small by removing and configuring most drivers as modules.
ls -lt ./arch/i386/boot/bzImage
-rw-r--r-- 1 jfclere users 835540 2005-08-01 22:40

Do the job:
mkfs.ext2 /dev/fd0
fsck -f -t ext2 /dev/fd0
mount /dev/fd0 /mnt/test1
mkdir -p /mnt/test1/boot/grub
cp /home/jfclere/KERNEL/linux-2.6.10/arch/i386/boot/bzImage /mnt/test1
cp /home/jfclere/tmp/initrd /mnt/test1
cp /boot/grub/menu.lst /mnt/test/boot/grub
cp /boot/grub/stage1 /mnt/test/boot/grub
cp /boot/grub/stage2 /mnt/test/boot/grub

menu.lst contains:
color white/blue black/light-gray
timeout 8

title linuxtest
kernel (fd0)/bzImage root=/dev/hda1 vga=791
initrd (fd0)/initrd
title floppy
root (fd0)
chainloader +1

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