1-Understanding Linux Systems

Next we go into the world of Linux

Learning Focus:

• Introduction to Linux Systems
• Application of Linux System
• Characteristics and composition of Linux systems
• Linux Version Introduction

Learning content:

1.0 What is Linux

Linux is a free, multi-user, multitasking operating system that works like a Unix system, but the stability, security, and network capabilities of Linux systems are unmatched by many commercial operating systems. The biggest feature of Linux is that the source code is completely open, in accordance with the principle of GNU/GPL, anyone can freely obtain, propagate and even modify the original code. That's why it's important to talk about open source culture first.

Application of 1.1 Inux system

The application of Linux system mainly involves 4 aspects: Application Server, embedding is domain. Software development and desktop applications. The advantages of Linux system are mainly in server-side and embedded two domains, Windows system-friendly interface. Easy to operate and a variety of application certificates that Linux lacks.

Features of the 1.2 Linux system

• Open
• Multi-user
• Multi-tasking
• A good user interface
• Device independence
• Reliable Security
• Good portability

1.3 The composition of Linux systems

The Linux system consists of four parts: the kernel, the Shell, the file system and the application, and the first three together constitute the basic operating system structure. Through them, the user can use the system.

1) kernel is the core of the operating system, with many basic functions, such as virtual memory, multitasking, shared library, demand loading, executable program and TCP/IP network functions.

2) The shell is the user interface of the system, which provides an interface for the user to switch operations with the kernel.

3) file system is an organization method for storing files on storage devices such as disks

4) Standard Linux systems have a set of assemblies called applications, which include text editors, programming languages, X Window, Office software, Internet Tools, and database applications.

1.4 Linux kernel version

The kernel is a low-level support version that deals with hardware and provides a limited set of services for user programs, and the computer system is a symbiosis of hardware and software, interdependent and indivisible.

The Linux version number is divided into: Kernel version and release version.

The kernel version version number has 3 numbers: r.x.y

R: Currently released kernel major version

x: Even for stable version, odd for Developing (Beta) version

Y: Number of bug fixes

1.5 More common releases on the market today

Mandriva,ret hat,suse,debian,ubunyu,red Flag ...

1-Understanding Linux Systems