214
Basic System Administration
then you need only add the following section:
image=/vmlinuz.old
root=/dev/hda1
label=Old
read only
next, run lilo and the new kernel will be installed with access to the old kernel
as a fall back.
Debian kernels are often built with all the SCSI low level drivers built in.
This makes the uncompressed kernel greater than 1 Meg, requiring the use of
bzImage instead of zImage. bzImages can sometimes cause problems for
some hardware and for some loaders. loadlin has been known to have problems
with these kernel images in the past, although most of those difficulties have
already been fixed.
If loadlin is used as the boot loader, then none of the above actions will make
the new kernel available. You must copy the zImage file to the file that is
used on the DOS partition as the kernel image file. If you use loadlin to boot
the file linux from your DOS partition, then you must copy the new kernel
image into the file linux on the DOS partition. Also make sure that make
modules install has been run, and you are ready to reboot the new kernel.
If you boot from a floppy, then mount the floppy as a DOS disk, and copy the
kernel image file from /arc/i386/boot/zImage to the file linux on the floppy.
This is the kernel image file on the boot floppy and replacing it with the new
kernel image will allow the system to boot under the new kernel.






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