[CentOS] kernel recompile help

Ryan ryanag at zoominternet.net
Wed Nov 9 23:36:28 UTC 2005

Jim Perrin wrote:
>>>Now that I've given you the warning, the how-to I'd recommend reading
>>>is here -> http://crab-lab.zool.ohiou.edu/kevin/kernel-compilation-tutorial-en/
>>Great link. Thanks.
> No problem. Hope it works out okay for you. If you have any issues
> with the instructions I'd like to know about them if you're willing to
> share.

Ok get ready for some weirdness...

The CentOS kernel src RPM puts the source in:

I didn't really want to install this kernel as an RPM, so the below 
steps do not result in a kernel RPM, just a new kernel.

To recompile kernel:

[optional - boot set /etc/inittab to boot to runlevel 3 and reboot, this 
will free up some resources and make this go faster]

1. Get the kernel source of your choosing.
rpm -Uvh kernel.src.rpm

2. Get the development packages
yum install kernel-devel ncurses-devel

3. Move into the directory (this assumes you used 2.6.9 source)
cd /usr/src/redhat/BUILD/kernel-2.6.9/linux-2.6.9/

4, Edit EXTRAVERSION to say -something
nano Makefle, "EXTRAVERSION = -something"

6. Get a baseline kernel config to start with.
make oldconfig

7. Edit the kernel options (modules and includes)
make menuconfig

8. Exit menuconfig and save configuration
hit <yes>

9. Get ready to build
make clean

10. Create image
make bzImage

11. Compile modules
make modules && make modules_install

12. Install
make install

13. Set system to boot new kernel
system-config-boot if in GUI, hack /etc/grub.conf if not

14. Reboot

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