What parts does the function of the linux kernel consist of?

The function of the Linux kernel consists of 5 parts, namely process management, memory management, inter-process communication, virtual file system and network interface; Linux is an open source computer operating system kernel, which is written in C language Written as a Unix-like operating system that complies with POSIX standards.

#The operating environment of this tutorial: linux5.9.8 system, Dell G3 computer.

What parts does the function of the Linux kernel consist of?

A complete Linux kernel generally consists of 5 parts, which are process management, memory management, inter-process communication, virtual file system and network interface.

Linux is an open source computer operating system kernel. It is a Unix-like operating system written in C language and compliant with POSIX standards.

Linux was first developed by Linus Torvalds of Finland in an attempt to provide a free Unix-like operating system on the Intel x86 architecture. The project started in 1991, with some Minix hackers assisting in the early days of the project, and now countless programmers around the world are helping the project for free.

The operating system is a low-level support software used to deal with hardware and provide a limited set of services for user programs. A computer system is a symbiosis of hardware and software. They are interdependent and inseparable. Computer hardware includes peripherals, processors, memory, hard drives, and other electronic devices that make up the computer's engine. But without software to operate and control it, it cannot work by itself. The software that completes this control work is called the operating system. In Linux terminology, it is called the "kernel" or "core". The main modules (or components) of the Linux kernel are divided into the following parts: storage management, CPU and process management, file system, device management and driver, network communication, as well as system initialization (boot), system calls, etc.

The Linux kernel uses three different version numbering methods.

The first method is used before version 1.0 (including 1.0). The first version was 0.01, followed by 0.02, 0.03, 0.10, 0.11, 0.12, 0.95, 0.96, 0.97, 0.98, 0.99 and then 1.0.

The second method is used from 1.0 to 2.6. The number consists of three parts "A.B.C", A represents the major version number, B represents the minor version number, and C represents the smaller final version number. A only changes when the kernel changes significantly (it has only happened twice in history, 1.0 in 1994 and 2.0 in 1996). You can judge whether Linux is stable by the number B. The even-numbered B represents the stable version, and the odd-numbered B represents the development version. C represents the number of bug fixes, security updates, new features and drivers. Taking version 2.4.0 as an example, 2 represents the major version number, 4 represents the minor version number, and 0 represents the final version number with minor changes. In the version number, a version with an even number in the second digit of the serial number indicates that it is a stable version that can be used, such as 2.2.5, while a version with an odd number in the second digit of the serial number generally has some new things added, which is not necessarily the case. Very stable test version, such as 2.3.1. In this way, the stable version is derived from the upgrade version number of the previous beta version, and a stable version will no longer develop after it develops to full maturity.

The third method, starting from version 2.6.0 in 2004, uses a "time-based" method. Before version 3.0, it was an "A.B.C.D" format. In seven years, the first two numbers A and B, namely "2.6", have remained unchanged, C has increased with the release of new versions, and D represents the number of bug fixes, security updates, and the number of new features and drivers added. After version 3.0, there is the "A.B.C" format, B increases with the release of new versions, and C represents the number of bug fixes, security updates, new features and drivers. In the third method, the naming method such that even numbers represent stable versions and odd numbers represent development versions is no longer used. For example: 3.7.0 does not represent the development version, but the stable version.

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