Linux operating system history

When we learn about the Linux operating system, Do you think of its history? This article will explain the Linux operating system for you. Linux was a core operating system written in 1991 by Linus Torvalds, a Finnish college student...

Unix and Linux history...
Multics System: A system developed by Bell Labs and MIT (MIT) in collaboration with GE General Electric;

1969: K. Thompson wrote a simple file system for DEC, the predecessor of Unix, but the word Unix has not yet appeared

1973: Bell's D. Richie changed Thompson's small system in C language, all of which were rewritten with ASCII files for ease of application! This is the first Unix operating system term. However, since Unix is set for different hardware, it only appears on a large Server.
See! After several years, the following versions are available:
1. System V comes from ATT;
2. BSD is from Caltech;
3. AIX from IBM

1979: Richard Stallman advocates the Open source spirit;

1984: the GNU and Free Software Foundation (FSF) was proposed by R. Stallman;

1986: Xfree86 appeared on Unix and was integrated into Linux in 1994!

1991: Linus Torvalds, a Finnish college student, announced for the first time Linux Kernel version 0.02 on the internet, known as holobby.

Briefly describe the spirit of GNU General Public License GPL:
The software authorized by GPL is Freeware. Anyone can have it;
A group (or business enterprise) that develops GPL can obtain the service fee through the service of the software;
If the software authorized by GPL is Open source, the original code should be published;
Anyone can modify the software authorized by GPL to meet their own needs;
After modification, Open source should be returned to the Linux community.

(PS. Open source has the biggest advantage of multi-person maintenance. debugs is faster and the program is safer, but the disadvantage is that it lacks dedicated personnel for maintenance !) If you like Linux, you need to know about it.

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