Chapter One introduction of Linux system and preparation of environment construction

1. Operating system:

Operating system, or OS, is the core of the computer system, which is the basic environment support for application operation and user operation.

The operating system is the system program software that is used to transfer information between the user and the computer system hardware.

1.1.2 What is Linux?

Linux: Unix-like operating systems.

Linux: Mainly used in server-side, embedded development and personal PC desktop 3 large areas, including server-side domain is the most important.

Some features of the Linux operating system:

(1), is open source code of the program software, can be freely modified;

(2), UNIX system compatible, with almost all the outstanding characteristics of Unix;

(3), free to disseminate, without any commercial copyright restrictions;

(4), suitable for Intel and other X86 CPU system architecture of the computer.

The Linux system was born around 1991, and it can be said that Linux evolved from UNIX.

1.2.2 Unix's Top 5 features

1. Mature technology, high reliability

2, very strong scalability;

3, powerful network function; TCP/IP is developed and developed on UNIX.

4, strong database support capabilities;

5, the powerful development function.

The GPL is all known as general public License, and the Chinese name is the generic common license. Linux servers are not allowed to restart at work.

Centos (Community Enterprise Operating System): Another important branch of Red hat. Currently, CentOS has been acquired by Red Hat.

Chapter One introduction of Linux system and preparation of environment construction