Linux and Unix introduction, thank you

In terms of function, there is almost no difference, Linux is developed by imitating the functions of Unix, so it is called Unix-like......

In terms of performance, although with the development of Linux, it has become more and more like replacing Unix, but it is not so easy to really replace it, because Unix manufacturers are basically developed by software and hardware, so the versatility of the Unix system is not high, mainly for special hardware design, so the performance and stability are extremely good; Linux is indeed a general-purpose system, and most vendors do not produce their own hardware (only a few manufacturers like Redhat do this, so they make a lot of money), so the biggest advantage of Linux is that it is compatible with it, but this determines that the performance cannot be played to the extreme......

Commercially speaking, due to the above performance differences, it leads to two different business models, UNIX software and hardware are sold together, and they are very expensive (except for FreeBSD), while Linux only buys software, and most of them are free (manufacturers like Radhat who take the road of UNIX are still a minority); So, UNIX is suitable for large enterprises, while Linux is suitable for small and medium-sized businesses and individual ......

If you know a little about their history, the two of them are not much different. Individual users use Linux more, and servers use UNIX more. The information in the library is more complete.

UNIX operating system is a multi-user, multi-task general-purpose operating system invented by Bell Labs in the United States. In 1974, the American Telegraph Company (AT&T) began to issue a non-commercial license for UNIX, allowing non-profit educational institutions to use UNIX for free, which strongly promoted the development and diversification of UNIX technology, and various versions of UNIX began to appear in the following years, the most famous of which is the BSD version of UNIX at the University of California, Berkeley. Since the end of the 70s, different commercial versions of UNIX have appeared on the market, and the more influential versions include:

Sun OS from Sun, Xenix from Microsoft and SCO, Unix386 IX from Interactive, Ultrix from DEC. Later, more famous UNIX systems appeared, including: IBM'S AIX, HP'S HP-UX, SCO's UNIX and ODT, and Sun's Solaris and other products.

To put it simply, Linux is a set of free-to-use and freely distributed UNIX-like operating systems, which is a multi-user, multi-tasking, multi-threading and multi-CPU operating system based on POSIX and UNIX. It runs major Unix tools, applications, and network protocols. Andrew S., Vrije University, Amsterdam, The Netherlands

Tanenbaum, 1987 developed a minix operating system for students to learn operating system principles. Minix thus gave rise to the prototype of today's Linux. Aminix is a very small UNIX operating system, mainly used for operating system teaching, the GNU Project, and the Free Software Association (FSF), 1984 by Richard M

Stallman founded the GNU system for a complete operating system similar to UNIX and free software.