common operating systems
①Concept: The operating system is managing computer resources. The so-called resources are hardware resources and software resources. The operating system is an intermediate platform responsible for connecting hardware and software, and the operating system itself is also software. From a hardware perspective, an operating system is a platform that integrates various hardware drivers☆
②Definition: The operating system is a computer program that manages computer hardware and software, and is the core and cornerstone of a computer system☆
③Description: All software is installed on the operating system☆
④Common system:
1) Windows: civilian use (accounting for 80%)
2) MacOS: civilian use (accounting for 20%)
3) Linux: Commercial (Server)
4) Andriod: mobile Android phones (Hongmeng)
5) ios: Apple mobile phone
Introduction to linux operating system
Linux is an open source operating system. The so-called open source means free to use, open source code, copyright-free, and commercially available.
Linux has its own system concept: everything is a file, there is no concept of Windows system disk (File://) and each directory under the root directory (indicated by /) has a definite purpose
The entire ecosystem of Linux is very complete, supporting a variety of plug-ins, and the tool chain is complete
Linux distribution, the domestic mainstream is CentOS and Ubuntu
The predecessor of CentOS is Red Hat RedHat, open source and free, pure command line mode, while Ubuntu is a graphical operation interface.
The difference between Linux and Windows
There are many differences between the two, the more obvious difference is the difference between usage and graphics
Windows: mostly for civilian use, with graphics, convenient operating system, not open source, the server field is WindowsServer, which is charged
Linux: mostly commercial, domestic mainstream server operating system, open source and free, command line mode, high performance
Specific comparison:
1. Code authorization at the system level: Linux is a free system, and the source code of the system is also open, and users can edit and modify it; Windows is a system that requires a fee. be able to modify it;
2. Software ecology: In terms of the richness of software, windows far surpasses linux, especially in games; linux is currently mostly used for servers, and most applications on desktop operating systems are transplanted by third parties, which have both functions and ease of use a certain gap;
3. Stability: Many servers choose to use Linux because of its strong stability.
4. The Windows system distinguishes file attributes through file suffixes, and the Linux system does not have the concept of file suffixes.
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