Kernel is central component of an operating system that manages operations of computer and hardware. It basically manages operations of memory and CPU time. It is core component of an operating system. Kernel acts as a bridge between applications and data processing performed at hardware level using inter-process communication and system calls.
Debian 10 comes with Kernel 4.19 as default version. This can be upgraded to 5.x version available right now using the backport repository.
Let us confirm the current kernel version we're on using the
root@vps:~# uname -r 4.19.0-20-amd64
Upgrading the kernel to 5.x requires you to add the backports repository into the
Backports are the packages from the next version of Debian that is going to be or has been released.
Let us add the backports repository into
sources.list and update the packages,
echo "deb http://deb.debian.org/debian buster-backports main" | tee -a /etc/apt/sources.list apt-get update
root@vps:~# echo "deb http://deb.debian.org/debian buster-backports main" | tee -a /etc/apt/sources.list deb http://deb.debian.org/debian buster-backports main root@vps:~# apt-get update Hit:1 http://security.debian.org/debian-security buster/updates InRelease Hit:2 http://deb.debian.org/debian buster InRelease Get:3 http://deb.debian.org/debian buster-updates InRelease [56.6 kB] Get:4 http://deb.debian.org/debian buster-backports InRelease [51.4 kB] Get:5 http://deb.debian.org/debian buster-backports/main amd64 Packages [487 kB] Get:6 http://deb.debian.org/debian buster-backports/main Translation-en [411 kB] Fetched 1,007 kB in 1s (1,242 kB/s) Reading package lists... Done
Once the packages have been updated, let us verify the kernel versions which are available for us to install.
For this, run the following command,
apt search linux-image
You can notice several versions being listed that are available from backports repository.
To install the new kernel, run the following command,
apt -t buster-backports upgrade
Once the Kernel has been installed, reboot the server so it can boot into the new version.
Now, let us confirm the kernel version the Debian system is on by using the
root@vps:~# uname -r 5.10.0-0.deb10.16-amd64