Linux is a free and open source Unix-like operating system. There are many different versions of Linux, but they all use the Linux kernel. Linux can be installed on a variety of computer hardware devices, from cell phones, tablets, routers, and video game consoles, to desktop computers, mainframes, and supercomputers. Linux is a leading operating system. The 10 fastest supercomputers in the world all run Linux operating system. Strictly speaking, the word Linux itself only refers to the Linux kernel, but in fact people are accustomed to using Linux to describe the entire operating system based on the Linux kernel and using various tools and databases of the GNU Project.
The Linux system is very stable and has applications in various types of enterprises. Small and medium-sized enterprises generally value open source and free, and do not need to pay expensive license fees like Windows. At the same time, Linux has very few viruses, is very safe, and requires a few configurations. Enterprise-level applications such as ftp, http, samba, etc. are very suitable. Large enterprises generally value open source, security, stability, and secondary development. Personally, I feel that if a Windows server is not restarted for half a year, all kinds of weird problems will occur, while Linux is very stable.
Unix can be said to be the oldest operating system. Linux is similar to Unix, but Unix generally requires expensive licensing fees and is generally used to deploy some high-end services.
Compared with Linux Differences and connections
UNIX is a multi-user and multi-task operating system with powerful functions and comprehensive performance. It can be applied on a variety of different platforms from supercomputers to ordinary PCs. It is the most widely used and The most influential operating system.
Linux is an operating system that has the same appearance and performance as or better than UNIX. However, Linux does not originate from the source code of any version of UNIX. It is not UNIX, but a product similar to UNIX. . Linux products successfully imitate UNIX systems and functions. Specifically, Linux is an operating system compatible with System V and BSD UNIX. For System V, currently, the software program source code can be run after being recompiled under Linux. , and for BSD UNIX, its executable file can be run directly in the Linux environment.
Linux is an operating system that imitates the interface and functions of Unix, but the source code has nothing to do with Unix. In other words, linux is not unix, but like unix. (Linux is not unix!)
Two other major differences:
1) Most UNIX systems are matched with hardware, while Linux can run on a variety of hardware platforms.
2) Some versions of UNIX such as aix and hp-ux are commercial software and closed source (but solaris, *bsd and other unixes are open source), while Linux is free software, free and open source code .