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This article mainly introduces the example analysis of the development history of Linux, which is very detailed and has certain reference value. Friends who are interested must finish it!

The history of Linux development

1. What is the operating system?

When we use computers, we usually use applications. For example, I now visit the cloud community in my Chrome browser. Chrome runs on the operating system, and the operating system drives the hardware, that is, our computer, and their relationship is as follows:

2. Unix-- > Minix-- > Linux

The Unix operating system was developed by Bell Labs, and later, due to a change in AT&T policy, after the launch of Version 7 Unix, it issued new terms of use, privatized the UNIX source code, and could no longer use UNIX source code in universities. In order to teach students the practical details of the operation of the operating system in class, Professor Andrew S. Tanenbaum decided to develop an operating system compatible with AT&T without using any UNIX source code to avoid copyright disputes. He called it MINIX in the sense of a small UNIX (mini-UNIX). It is said that Professor Tan did not look at the Unix code when developing Minix to avoid legal disputes.

It is reported that even inexperienced students can gain a good understanding of the whole system in a few months of typical training courses. The most famous student user of Minix is Linus Torvalds, who built the kernel of a new operating system using the Minix operating platform at the University of Helsinki in Finland, which he calls Linux. Linux was developed by Linus, open source, free, to replace your Unix, when he was a student.

3. Free software-- > GNU-- > GPL

Free software, not free, can be used freely and spread freely. Stallman founded the GNU Free Software Foundation, which has some excellent free software, but no system kernel, so it cooperates with Linux as the system kernel, so Linux is also called GNU/Linux.

GNU, GNU is not Unix, the goal is to invent an alternative Unix system. The official website gnu.org. There are many excellent software, such as gawk, bash, gcc, emacs and so on.

GPL is a general public license

Everyone can spread the software freely.

You are free to modify the software, but you need to release the modified software.

4. The release of Linux

Distributions are made for many different purposes, including support for different computer structures, localization of a specific region or language, real-time applications, and embedded systems, and even many versions deliberately add only free software. More than 300 distributions have been actively developed, with about a dozen of the most commonly used distributions.

It needs to be emphasized that the difference between Redhat and CentOS

CentOS (Community Enterprise Operating System, Chinese meaning: community enterprise operating system) is one of the Linux distributions, which is compiled from the source code released by Red Hat Enterprise Linux in accordance with open source regulations. Because it comes from the same source code, some servers that require high stability replace the commercial version of Red Hat Enterprise Linux with CentOS. The difference between the two is that CentOS does not contain closed source software.

CentOS's goal is to be exactly the same as Redhat. After the release of Redhat, the CentOS team removes the paid software from Redhat, removes Redhat logo, and Release again.

The above is all the contents of the article "sample Analysis of the Development History of Linux". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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