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This article introduces the relevant knowledge of "the method of compiling and installing the CentOS kernel". Many people will encounter this dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Brief introduction of Linux Kernel

Now let's take a look at the architecture of the GNU/Linux operating system from a higher perspective. You can consider the operating system at two levels, as shown in the following figure

At the top is the user (or application) space. This is where the user application executes. Below user space is the kernel space, where the Linux kernel is located.

GNU C Library (glibc) is also here. It provides a system call interface to connect to the kernel and a mechanism to convert between user-space applications and the kernel. This is important because kernel and user-space applications use different protected address spaces. Each user-space process uses its own virtual address space, while the kernel occupies a separate address space.

The Linux kernel can be further divided into three layers. At the top is the system call interface, which implements some basic functions such as read and write. Beneath the system call interface is the kernel code, which can be more precisely defined as architecture-independent kernel code. This code is common to all processor architectures supported by Linux. Beneath this code is architecture-dependent code that forms a part commonly referred to as BSP (Board Support Package). This code is used as a processor for a given architecture and platform-specific code.

The Linux kernel implements many important architectural attributes. At a high or low level, the kernel is divided into multiple subsystems. Linux can also be seen as a whole because it integrates all these basic services into the kernel. This is different from the architecture of the microkernel, which provides basic services such as communication, Icano, memory, and process management, and more specific services are plugged into the microkernel layer.

Kernel compilation of CentOS system and

Download the kernel

Download the kernel from the official website https://www.kernel.org/. I downloaded linux-3.13.7.tar.xz.

The code is as follows:

Cat / proc/version # check my kernel version first

The code is as follows:

Cd / usr/src

Wget https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.13.7.tar.xz

Xz-d linux-*.tar.xz

Tar xf linux-*.tar

Cd linux-3.13.7

# clear source tree and .config

Make mrproper

You may report an error at this time, and you will be prompted as follows

* Unable to find the ncurses libraries or the

# workaround installation

# centos

Yum install ncurses-devel-y

# ubuntu

Apt-get install ncurses-dev

Custom kernel

The code is as follows:

Make menuconfig # should at least select the network card, file system and sound card driver. For configuration instructions, see the appendix at the bottom.

# 2.6 the previous version is, but now the kernel does not need make dep

Make dep

Make bzlmage

Make modules

Make modules_install

Make install

# compiling the kernel

Make

When make bzImage # compiles the kernel image, you will be prompted as follows

# Kernel: arch/x86/boot/bzImage is ready

Make modules # compiling kernel module

Make modules_install # install kernel module

# my 3.13.7 doesn't need too complicated configuration

Make install # is installed directly, including kernel mapping, grub configuration does not need to be manually configured, it is automatically configured for you by script

Let's see, what does the install.sh script do when I execute make install?

Now we can see that the previous tedious steps have been omitted and all the scripts have been dry. In fact, the script does the following for us.

Installation completed

This is the end of the compilation and installation of the CentOS kernel. Thank you for your reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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