In this article, we will guide you through the process of applying kernel patches on Ubuntu. This can be a complex task, especially for beginners, but we will break it down into simple, manageable steps.
To apply kernel patches on Ubuntu, you need to clone the kernel source code, apply the patches, configure the kernel, build and install the kernel, update GRUB, and reboot the system. It is a complex task that requires several steps, but by following the instructions provided in the post, you can successfully apply kernel patches on Ubuntu.
Kernel patches are modifications to the Linux kernel, the core of the operating system. They can be used to fix bugs, improve performance, or add new features.
Before we start, make sure you have the necessary packages installed on your system. You can do this by running the following command:
sudo apt-get install git build-essential kernel-package fakeroot libncurses5-dev
This command uses the
apt-get package manager to install several packages:
git: a version control system
build-essential: a package that includes various tools necessary for compiling software
kernel-package: a tool for building kernel and modules
fakeroot: a tool that allows a non-privileged user to run commands as root
libncurses5-dev: a library for terminal-based interfaces
Cloning the Kernel Source Code
Next, we need to clone the kernel source code. We can do this with the
git clone git://git.launchpad.net/~ubuntu-kernel-test/ubuntu/+source/linux/+git/mainline-crack v4.4
This command clones the kernel source code from the specified URL into a directory called
Applying the Patches
Now, we can apply the patches. First, copy the patch files to the kernel directory. Then, change to the kernel directory with the
Next, apply the patches with the
patch -p1 < 0001-base-packaging.patch
patch -p1 < 0002-debian-changelog.patch
patch -p1 < 0003-configs-based-on-Ubuntu-4.4.0-0.10.patch
These commands apply the patches in the specified order. The
-p1 option strips the leading directory from the file names in the patch file.
Configuring the Kernel
Before we can build the kernel, we need to configure it. We can do this with the following commands:
cp /boot/config-`uname -r` .config
These commands do the following:
cp /boot/config-uname -r
.config: copies the current kernel configuration to the
.configfile in the kernel directory.
gedit .config: opens the
.configfile in a text editor.
make oldconfig: updates the
.configfile with default answers to any new configuration options.
make menuconfig: opens a graphical menu for configuring the kernel.
Building and Installing the Kernel
Now, we can build the kernel with the
make -j `getconf _NPROCESSORS_ONLN` deb-pkg LOCALVERSION=-custom
This command builds the kernel and generates
.deb packages. The
-j option specifies the number of jobs (commands) to run simultaneously.
getconf _NPROCESSORS_ONLN returns the number of processors available, so this command uses all available processors to speed up the build process.
Finally, we can install the generated
.deb files with the
sudo dpkg -i ../*.deb
This command installs all
.deb files in the parent directory.
Updating GRUB and Rebooting
After installing the new kernel, we need to update the GRUB bootloader and reboot the system:
update-grub command updates the GRUB bootloader with the new kernel, and the
reboot command reboots the system.
Applying kernel patches on Ubuntu can be a complex task, but with these steps, you should be able to do it successfully. Remember to always backup your data before making any major changes to your system.
Kernel patches are modifications to the Linux kernel that can fix bugs, improve performance, or add new features.
You might need to apply kernel patches on Ubuntu to fix specific issues, improve compatibility with hardware or software, or enable new features not available in the default kernel.
Applying kernel patches can be complex, especially for beginners. It is recommended to have some knowledge of Linux and the Ubuntu operating system before attempting to apply kernel patches.
You can run the command
sudo apt-get install git build-essential kernel-package fakeroot libncurses5-dev to install the necessary packages. If they are already installed, the command will inform you that they are up to date.
Kernel patches are specific to certain versions of the Linux kernel. Make sure the patches you have are compatible with the version of the kernel you are using.
If you want to revert the changes made by a kernel patch, you can uninstall the kernel package and reinstall the previous version of the kernel. However, this process can be complex and may require advanced knowledge.
Yes, it is necessary to configure the kernel before building it. The configuration process allows you to customize various options and settings according to your needs.
Yes, you can build the kernel without applying any patches. However, applying patches can be beneficial as they can fix bugs or add new features.
If you encounter errors during the patching or building process, it is recommended to search for the specific error message online or consult relevant documentation or forums for assistance.