What system is linux?

Linux operating system is a computer operating system, and the Chinese pronunciation is generally "Linux". The kernel name of the Linux operating system is also "Linux". Linux operating system is also the most famous example in the development of free software and open source. Linux is loved by computer enthusiasts for two main reasons. First, it belongs to free software, users can get it and its source code without paying any fees, and they can make necessary modifications according to their own needs, and use it for free and continue to spread it without restrictions. Another reason is that it has all the functions of Unix, and anyone who uses Unix operating system or wants to learn Unix operating system can benefit from Linux. Running Linux requires low configuration, supports many PC peripherals, and such powerful software is completely free, and its source code is completely open and anyone can use it. Speaking of which, you may wonder, is there something hidden behind this free? Will the author be willing not to take out a penny? In fact, it represents another concept of software development: the copyright system based on GNU.