Recompile your kernel
Linux
CentOS
Debian
Here is a list of packages needed to recompile the kernel:
aptitude install bzip2 libncurses5-dev fakeroot kernel-package
Let’s go to /usr/src:
cd /usr/src
Then, go to www.kernel.org and download the latest version in “Full” of the latest kernel. Here, it’s version 4.8.4, then we extract it:
wget https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.8.4.tar.xz
tar -xJf linux-4.8.4.tar.xz
Now let’s create a symbolic link:
ln -s linux-4.8.4 linux
The kernel is ready to be configured. Let’s launch the configuration tool:
cd linux
make menuconfig
Or copy the configuration of your existing kernel:
cp /boot/config-$(uname -r) .config
To avoid a “x509_certificate” error during compilation, we will disable the kernel signature (we don’t have the signature key, it belongs to Debian):
sed -i 's/^CONFIG_SYSTEM_TRUSTED_KEY/# CONFIG_SYSTEM_TRUSTED_KEY/g' .config
sed -i 's/^CONFIG_MODULE_SIG_KEY/# CONFIG_MODULE_SIG_KEY/g' .config
It’s possible to use all of your cores to speed up compilation time:
export CONCURRENCY_LEVEL=`grep -c "^processor" /proc/cpuinfo`
New method
Once configured, all that’s left is to launch the compilation:
make clean
make deb-pkg LOCALVERSION=-custom KDEB_PKGVERSION=$(make kernelversion)-1 -j $CONCURRENCY_LEVEL
You can change the name of LOCALVERSION to a name that suits you better and increment KDEB_PKGVERSION each time you compile.
Old method
Once configured, all that’s left is to launch the compilation:
make-kpkg clean
make-kpkg --initrd --revision=1.0 kernel_image
or without initrd:
make-kpkg --revision=1.0 kernel_image
The revision tag is used to put a version number on your kernel. That way, if during the next boot you get a kernel panic, restart with the old one and start over. When recompiling it, increment the version by 1 (ex: –revision=2.0).
Your kernel is now finished, let’s install it:
dpkg -i ../linux-image-4.8.4_1.0_amd64.deb
Now restart your machine and boot on your new kernel :-)
Here are other documentations:
Debian Kernel 2.4
Debian Kernel 2.6
Fedora Core
Mandriva
Suse
Ubuntu
Last updated 10 Nov 2016, 23:54 +0200.