Soon we will have a brand new Linux 5.0. It's not a real major release … it's just … easier to count from zero again rathen than higher than 20.
So each time there is a new release, i quickly (ahem) update it.
Here's my little ritual to upgrade to a new kernel !
- Get the source
- Decompress and update the symlink
- Configuring the new features
- Installing and testing
- Updating the bootloader
Let's be more verbose !
1. Get the source
Which better place to get the sources than the famous source ?
I just copy the link Latest Stable Kernel du jour.
2. Decompress and update the symlink
cd /usr/src/ I go to the right folder.
wget le latest I download from the link from the first step.
tar xvf *.tar.xz Let's decompress this shit.
unlink linux Removing the old symlink (you can use rm but it's way more impressive to use this command !).
ln -s linux-votre-latest linux I create the symlink to the new sources.
zcat /proc/config.gz > linux/.config First i get the actual config from the running kernel and i put it in the new sources.
make oldconfig And now i ask the kernel to apply this config and it will ask question about any new feature to enable/disable them (most of the time, I disable; I love minimalism). Often I need to search the web to know what are those.
make -j32 I just compile.
su I'm the one who knocks.
make modules_install I install the kernel modules (i don't have many but they still need to be in the righ place (/lib/modules/kernel.version)). It should be good now.
5. Installing and testing
mount /dev/sda1 /boot Before continuing I must mount the boot partition.
cp /arch/x86/boot/bzImage /boot/boot/kernelXXXX I then paste the brand new compiled kernel.
reboot The mighty reboot.
e To stop Grub from booting and edit the boot command line. I just need to edit the name of the booting kernel to the new one.
6. Updating the bootloader
If it successfully booted then I hardcode it in the config.
su I put on my boss cosplay.
mount /dev/sda1 /boot I mount the boot partition again.
vi /boot/boot/grub/menu.lst Then I edit the Grub config file with the correct kernel filename.
Et voilà, c'est bon.
From time to time I remove the old kernels from /boot and I also remove the old modules in /lib/modules.