|
 |
|
| |
15.4 Creating Boot CDs
If problems occur booting your system using a boot manager or if the boot
manager cannot be installed on the MBR of your hard disk or a floppy disk,
it is also possible to create a bootable CD with all the necessary
start-up files for Linux. This requires a CD writer installed in your
system.
Creating a bootable CD-ROM with GRUB merely requires a special form of
stage2 called stage2_eltorito
and, optionally, a customized menu.lst. The classic
files stage1 and stage2 are not
required.
Creating Boot CDs
-
Change into a directory in which to create the ISO image, for example:
cd /tmp
-
Create a subdirectory for GRUB and change into the newly created
iso directory:
mkdir -p iso/boot/grub && cd iso
-
Copy the kernel, the files stage2_eltorito,
initrd, menu.lst, and
message to iso/boot/:
cp /boot/vmlinuz boot/
cp /boot/initrd boot/
cp /boot/message boot/
cp /usr/lib/grub/stage2_eltorito boot/grub
cp /boot/grub/menu.lst boot/grub
-
Adjust the path entries in boot/grub/menu.lst to
make them point to a CD-ROM device. Do this by replacing the device name
of the hard disks, listed in the format
(hdx,y), in the pathnames
with (cd), the device name of the CD-ROM drive. You
may also need to adjust the paths to the message file, the kernel, and
the initrd—they need to point to
/boot/message, /boot/vmlinuz
and /boot/initrd, respectively. After having made
the adjustments, menu.lst should look similar to
the following example:
timeout 8
default 0
gfxmenu (cd)/boot/message
title Linux
root (cd)
kernel /boot/vmlinuz root=/dev/sda5 vga=794 resume=/dev/sda1 \
splash=verbose showopts
initrd /boot/initrd
Use splash=silent instead of
splash=verbose to prevent the boot messages from
appearing during the boot procedure.
-
Create the ISO image with the following command:
genisoimage -R -b boot/grub/stage2_eltorito -no-emul-boot \
-boot-load-size 4 -boot-info-table -iso-level 2 -input-charset utf-8 \
-o grub.iso /tmp/iso
-
Write the resulting file grub.iso to a CD using
your preferred utility. Do not burn the ISO image as data file, but use
the option for burning a CD image in your burning utility.
|
|
|
