How to Install Linux Kernel 5.15 on AlmaLinux 8

Linux kernel 5.15 is out with many new features, support, and security. The Linux 5.15 kernel release further improves the support for AMD CPUs and GPUsIntel’s 12th Gen CPUs, and brings new features like NTFS3, KSMBD (CIFS/SMB3), and further Apple M1 support, amongst many other changes and additions.

In the following tutorial, you will learn how to install the latest 5.15 Linux Kernel on AlmaLinux 8.

Prerequisites

  • Recommended OS: AlmaLinux 8.
  • User account: A user account with sudo privilages or root access (su command).

Update Operating System

Update your AlmaLinux operating system to make sure all existing packages are up to date:

sudo dnf upgrade --refresh -y

The tutorial will be using the sudo command and assuming you have sudo status.

To verify sudo status on your account:

sudo whoami

Example output showing sudo status:

[joshua@almalinux ~]$ sudo whoami
root

To set up an existing or new sudo account, visit our tutorial on How to Add a User to Sudoers on AlmaLinux.

To use the root account, use the following command with the root password to log in.

su

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Import and Install ELRepo & GPG Key

The first step is to import the repository from ELREPO from the ELRepo project. This has the latest available kernel or the LTS version with regular updates, so you do not need to compile kernels and install and upgrade using the dnf package manager.

First, import the GPG key to verify the installation package:

sudo rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org

Next, install the repository, use the following command:

sudo dnf install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm

Example output:

How to Install Linux Kernel 5.15 on AlmaLinux 8

Type “Y,” then press the “ENTER KEY” to proceed.

Install Latest Kernel 5.15

With the repository and GPG imported, you can now proceed with the installation which you will use the ELRepo mainline branch to install kernel 5.15.

To install the latest mainline support kernel (NON-LTS):

sudo dnf --enablerepo=elrepo-kernel install kernel-ml kernel-ml-devel kernel-ml-headers

Example output:

How to Install Linux Kernel 5.15 on AlmaLinux 8

Type “Y,” then press the “ENTER KEY” to proceed.

Now reboot your system; during the boot window with kernels to choose from, select kernel 5.15.

reboot

Example:

How to Install Linux Kernel 5.15 on AlmaLinux 8

Once back in your system, verify the new kernel and build:

uname -r

Example output:

5.15.1-1.el8.elrepo.x86_64

Congratulations, you have installed the latest 5.15 kernel on your AlmaLinux 8 system.


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Updates for Kernel 5.15

To keep your kernel 5.15 up to date, you will use the dnf refresh command to pull updates from the ELRepo repository just like any other package on your system.

To check for updates and upgrade.

sudo dnf upgrade --refresh -y

Remember, for any kernel updates, and you will need to reboot your system:

Comments and Conclusion

In the tutorial, you have learned how to install the latest 5.15 kernel on your AlmaLinux operating system. Note, if your system is a production server, it would be advised to use the existing kernel that ships the standard installation for the most stability.

However, for those wanting to try kernel 5.15, you can undoubtedly swap back to previous kernels quite easily in the boot menu, so giving it a try isn’t a bad idea, especially if you got new hardware that isn’t supported by the default AlmaLinux kernel.

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