| SUSE LINUX Enterprise Server – Installation and Administration Chapter 9. The Linux Kernel / 9.7. Installing the Kernel | ||||
|---|---|---|---|---|
 | 9.6. Compiling the Kernel | 9.8. Cleaning Your Hard Disk after Compilation |  | |
| SUSE LINUX Enterprise Server – Installation and Administration Chapter 9. The Linux Kernel / 9.7. Installing the Kernel | ||||
|---|---|---|---|---|
| 9.6. Compiling the Kernel | 9.8. Cleaning Your Hard Disk after Compilation | | |
After the kernel is compiled, it must be installed so it can be booted.
▪ x86
If you use LILO, LILO must be updated as well. To
prevent unpleasant surprises, it is recommended to keep the old kernel
(e.g., as /boot/vmlinuz.old), so you can still boot it
if the new kernel does not function as expected:▪
cp /boot/vmlinuz /boot/vmlinuz.old cp arch/i386/boot/bzImage /boot/vmlinuz lilo
▪ x86
The Makefile target make
bzlilo performs all three of these steps.
▪
![[Important]](admon/important.png) | Important |
|---|---|
If you use GRUB as the boot loader, it does not need to be reinstalled. Simply carry out the first two steps to copy the kernel to the right location in the system. | |
The above-mentioned file vmlinux must be copied to in the system directory. Next, when BootX is started, the new kernel must be selected before clicking .
Copy vmlinux to boot and adjust /etc/quik.conf.
Copy zImage from /usr/src/linux/arch/<arch>/chrpboot to DOS floppy disk.
Now the compiled modules need to be installed. Enter make modules_install to copy them to the correct target directories in /lib/modules/<version>. If the kernel version is the same, the old modules will be overwritten. However, the original modules can be reinstalled together with the kernel from the CDs.
![[Tip]](admon/tip.png) | Tip |
|---|---|
To avoid unexpected effects, make sure that modules whose functionalities may now have been directly compiled into the kernel are removed from /lib/modules/<version>. This is one of the reasons why inexperienced users are strongly discouraged from compiling the kernel. | |
▪ x86
To enable GRUB or LILO to boot the
old kernel (now /boot/vmlinuz.old), add an image entry
with the label Linux.old in your
/boot/grub/menu.lst or
/etc/lilo.conf This procedure is described in detail in
Chapter 8. Booting and Boot Managers. If you are using LILO as the boot loader, LILO
must be reinstalled after modifications to
/etc/lilo.conf with the command
lilo. GRUB does not need to be
reinstalled.
▪
▪ x86
The file /boot/System.map contains kernel
symbols required by the modules to ensure successful launching of kernel
functions. This file depends on the current kernel. Therefore, once you have
compiled and installed the kernel, copy
/usr/src/linux/System.map to the directory (/boot). This file is regenerated each time the
kernel is recompiled. If you create your kernel using
make bzlilo or make
zlilo, this is done for you automatically. If you get an
error message like System.map does not match current
kernel, System.map probably has not been
copied.
▪
