AlmaLinux 9 Upgrade Kernel Guide

Upgrading the kernel on your AlmaLinux 9 system is a vital maintenance task that enhances your system’s security and performance. This guide provides a streamlined set of commands for upgrading the kernel. Follow these steps to execute the upgrade smoothly.

🔐 Prerequisites:

• Logged in as a user with sudo privileges.
• Backup your important data.
• Acknowledge the risks involved with a kernel upgrade.

🚀 Upgrade Steps:

1. Check Your Current Kernel Version:

   uname -r

2. Enable ELRepo Repository:

   sudo rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
   sudo dnf install https://www.elrepo.org/elrepo-release-9.el9.elrepo.noarch.rpm

3. Install the New Kernel:
   • Install the Latest Mainline Kernel:

     sudo dnf --disablerepo="*" --enablerepo="elrepo-kernel" list available
     sudo dnf --enablerepo=elrepo-kernel install kernel-ml

   • Install the Latest Long-Term Support Kernel:

     sudo dnf --disablerepo="*" --enablerepo="elrepo-kernel" list available | grep lt
     sudo dnf --enablerepo=elrepo-kernel install kernel-lt

4. Update the GRUB Configuration:

   sudo grubby --default-kernel
   sudo grubby --set-default /boot/vmlinuz-{your_kernel_version}

5. Reboot and Verify:

   sudo reboot

   After rebooting, check the kernel version again:

   uname -r

🔍 Final Checks:

• Ensure all services are running as expected.
• Monitor the system for any unusual behavior.

✅ Congratulations! You have successfully upgraded your AlmaLinux 9 kernel to the latest version.