Linux Tactic

Upgrading Your Linux Kernel on CentOS 7: A Step-by-Step Guide

How to Upgrade Your Linux Kernel

Linux is an open-source operating system known for its flexibility and customizability. One of the main advantages of using Linux is the ability to upgrade your kernel to take advantage of new features and improvements.

This article will guide you through the process of upgrading your Linux kernel on CentOS 7.

Checking Current Kernel

Before upgrading your kernel, you need to check which version you’re currently running. This will help you determine if an upgrade is necessary.

To check your kernel version on CentOS 7, open a terminal and type the following command:

uname -r

This command will display the current kernel version installed on your system.

Installing Prerequisites

Before we can start downloading the latest Linux kernel source, we need to install some prerequisites. These tools and packages are essential for building the kernel from source.

To install the required build tools and packages, open a terminal and run the following command:

sudo yum update

sudo yum install ncurses-devel

make gcc bc openssl-devel elfutils rpm-build

The above command will update your system and install all the necessary packages.

Downloading the Linux Kernel Source

Now that we have the prerequisites installed, we can proceed with downloading the latest Linux kernel source from the official website. To download the Linux kernel source, open a terminal and run the following command:

wget https://www.kernel.org/pub/linux/kernel/v5.x/linux-5.11.15.tar.xz

Replace the version number with the latest version available on the official website.

Compiling the Kernel

After downloading the latest Linux kernel source, we can proceed with the compilation process. To do this, you need to extract the source files and configure the kernel using the following commands:

tar xvf linux-5.11.15.tar.xz

cd linux-5.11.15

make menuconfig

The above commands will extract the source files and allow you to configure the kernel features. The “

make menuconfig” command will launch a graphical interface where you can select the kernel features you want to include in your new kernel. Once you’ve configured the kernel, start the compilation process using the following command:

make

This command will initiate the compilation process. The compilation process may take some time, depending on your system’s configuration and available resources.

Ensure that you have enough free space on your system to complete the process.

Conclusion

Upgrading your Linux kernel can enhance your system’s performance and provide you with access to the latest features and improvements. This article has provided you with a step-by-step guide on how to upgrade your Linux kernel on CentOS 7.

By following these steps, you can ensure that your system is up-to-date and running efficiently.

Installing and Using the Compiled Kernel – Part 2

Once you have compiled the Linux kernel, the next step is to generate the RPM package files, install them, and then check the kernel version. This article explains the entire process in detail.

Generating RPM Package Files

To generate RPM package files, you need to install the rpm-pkg utility. This tool will create the RPM package files based on the configuration you specified while compiling the kernel.

To install rpm-pkg, use the following command:

sudo yum install rpm-build

Once the rpm-pkg utility is installed, you can generate the RPM package files using the following command:

make rpm-pkg

The above command will create RPM package files under the rpm folder with names such as kernel-5.11.15-1.x86_64.rpm. The name includes the version number, architecture, and release number.

Installation

Now that the RPM package files are created, you can proceed with installing them. The installation process is straightforward and involves using the rpm command to install the package files.

To install the RPM package files, navigate to the rpm folder and run the following command:

sudo rpm -ivh kernel-5.11.15-1.x86_64.rpm

The above command will install the compiled kernel and place it in the /boot directory, updating the boot loader configuration to include the new kernel. Once the installation is complete, you need to reboot your system to apply the changes and start using the new kernel.

Checking the Kernel Version

After rebooting, you can verify that the new kernel version is installed and running by checking the current kernel version using the following command:

uname -r

This command will display the current kernel version installed on your system. Ensure that the version number corresponds to the kernel version that you compiled and installed.

Restart Computer

If you don’t see the updated kernel version, try restarting your system and checking again. Sometimes, newly installed kernels require a fresh restart to become the default boot option.

Post-Reboot Kernel Version

After rebooting your system, check the kernel version again using the same command:

uname -r

This time, the command should display the kernel version that you installed and configured. It means that you have successfully installed the newly compiled kernel.

Conclusion

In this article, we have successfully compiled the latest version of the Linux kernel, generated the RPM package files, and installed them on CentOS 7. We also learned how to check the current kernel version and verify that the newly installed kernel is running correctly.

The process described in this article will help you upgrade your Linux kernel and keep your system up to date with the latest improvements and features. In conclusion, this article provided a step-by-step guide to upgrading your Linux kernel on CentOS 7.

We covered the process of checking your current kernel version, installing prerequisites, downloading the latest kernel source, compiling the kernel, generating RPM package files, installing them, and finally checking the kernel version. Keeping the kernel up to date enhances the system’s performance and provides access to the latest features and improvements.

By following the process outlined in this article, you can ensure that your system is up-to-date and running efficiently.

Popular Posts