In-depth understanding of the core principles of the Linux operating system

The mention of Linux is very familiar to students who often come into contact with program code. As an open source free operating system, it is more and more professional and convenient for compiling codes and programs. It can be said that it is highly praised by most programmer colleagues. Even if you are not engaged in this industry, it is necessary to learn some basic knowledge of the Linux system. , a programmer who can only use Windows system will be disliked by his peers. Since Linux is so professional, what are the basic principles of this operating system? Let me give you a brief introduction below.

operating system

To understand its principles, you must first understand some basic concepts. The operating system is a low-level support software used to deal with hardware and provide a limited service set for user programs. A computer system is a symbiosis of hardware and software, which are interdependent and inseparable. Computer hardware, including peripherals, processors, memory, hard drives, and other electronic devices, form the chassis of the computer. And without software to operate and control it, it cannot work by itself.

linux operating system

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, and system initialization (boot), system calls, etc. The Linux kernel uses three different version numbering methods, each of which has been continuously upgraded and updated to become more secure and stable.

Specifically, the Linux kernel is designed as a monolithic structure American Linux host, which supports dynamic loading of kernel modules. In order to ensure support for new devices without infinitely expanding the kernel size, the Linux system requires drivers and new files. The system is modular and can be loaded and unloaded dynamically. The Linux kernel also uses virtual video memory technology to promote the video memory space to 4GB. It is reported that the Linux file system also implements a concrete file model - virtual file system (VFC)Linux operating system principle, this file system Belongs to UNIX style. This allows users to access various file systems of different formats on a unified interface.

Operation principle of Linux system

In general, there are two operating principles of the Linux system: first, everything is a file; second, every software has a certain purpose. The first one is that everything in the system is boiled down to a file, including commands, hardware and software devices, operating systems, processes, etc. For the operating system kernel, they are all regarded as files with their own characteristics or types. . As for Linux being based on Unix, this is largely because the basic ideas of the three are very similar.

The above is a brief introduction to the principles of Linux operating system and common Linux commands. I wonder if you will have a deeper understanding of Linux after reading this. If you feel that you do not understand it, Principles of linux operating system , you might as well buy some tutorials related to the Linux system or video teaching on the Internet, which are good. If you feel that your self-study ability is limited, it is also good to sign up for a class at some authoritative teaching institutions and learn Linux. It will greatly help in the compilation of program code in the future. That’s it for the above brief introduction to the principles of the Linux operating system. I hope it will be helpful to you.

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