Compiling a kernel is just a sequence of simple make commands… But before that you gotta make sure of the following…
1. Move the kernel you want to compile to /usr/src
2. Change to the directory where your kernel is placed…
3 .The next step is to execute a series of “make” commands…
make config /* here you’ll have to entertain a large number of
* kernel options though!
make oldconfig /* takes the default values of the previous compliation, be
* careful before using this, its much faster and easier, but
* you may not even want that configuration
4. Now you have to make the dependencies… do that by using…
5. Next run
make /* this will make all the files that are present in the kernel */
6. After doing these basic steps, you need to make the bootable image of the kernel.
This image you create will be stored at /usr/src/linux/arch/i386/boot/bzImage. Copy this to the “boot” directory.
cp /usr/src/linux/arch/i386/boot/bzImage /boot/vmlinuz-x.x.x.x
7. Once you are done with this much, make the modules and install them by running the following commands.
Now make sure you are the root or else the modules wont install.
mkinitrd /boot/initrd-x.x.x.x.img x.x.x.x
where x.x.x.x will be the directory of the modules for the new kernel. This directory can be seen when you do an ls like this:
then: cp System.map /boot/System.map-x.x.x.x
then: ln -sf /boot/System.map-x.x.x.x /boot/System.map
and then: cp bzImage /boot/bzImage
8. Lastly you have to edit the grub or lilo depending on what your boot-up uses.
edit /etc/grub.conf by adding your entry like this:
kernel /boot/vmlinuz-x.x.x.x ro root=dev/hda2
edit /etc/lilo.conf by adding your entry like this:
image = /vmlinuz-x.x.x.x
label = mynewKernel
root = /dev/hda2
save and run lilo by running a simple command as below: