Linux based operating system

Every time I began to write this kind of comparative theory, I always regretted that I didn't listen to the class .... Have the opportunity to learn to study again, cough. This is really not like a technical person, everything likes to push behind, I write in black font of everything purely from my brain, so even I am not sure whether it is completely correct.

when it comes to operating systems, most ordinary people think of Windows series, and Bill Gates's empire, as a child, heard Bill Gates catch Bugs when he was a child ( Bug The story, has been after he is a technology to people, later only to understand that its more a business genius, technological innovation is on the one hand, sometimes a business model of innovation, perhaps is an empire rise.

Microsoft was at the beginningMS-DOSbegan to develop, of course, this system is gates to a large company laboratory inadvertently see, and then buy it, then sold in the authorized mode, and then the initialWindowsis toMS-DOSdeveloped for the foundation, butalways blue screen but let Gates is very silent, and later bought another company, developed a andWindowsinterface functions exactly the same as the operating system, but is no longer inMS-DOSthe foundation. With the era of a call Steve Jobs, he is another kind of hardware and software bundled model for sales, we now use a lot of graphical interface features are from his company, his first experience is a little similar to gates, he also went to Xerox company when he saw a graphical interface of the east, originally wanted to buy, Without success, Jobs began to develop himself. To tell you the truth, if we hadn't gone to the story, maybe we knew its name becauseipone4oripod. Microsoft has also launched a number of server version of the operating system, but people are still more choiceUnixand ClassUnixsystem, speaking ofLinuxhistory is still a bit complicated, foreign cattle people feel that the current operating system can not meet their own needs, the general favorite thing to do is to write a ... Great God .....

Unixbefore birth, its developers would like to let others play their own games, but people are more interested in the actual carrier of the game, of course, he developed on the computer can only be used on his own computer, and others want to use only a difficult transplant, in order to facilitate the transplant, but also withCFrom the new writing. UnixDevelopment to later, the provision of source code can not be open to students, then, a professor does not lookUnixsource code, developed a compatibleUnixthe SystemMinix, of courseMinixIt was only for teaching, others wanted to join the various functions, but the professor did not agree ... Later, another student developed aLinux, it is open source, so the whole world is maintained together. Speaking ofLinuxit must be mentionedGUN,GUNthe full name is a recursive calledGUN is not Unix, the promotion of software is the crystallization of common wisdom, so should open the source code, can let everyone modify, and free to use, the free software movement has spawned a lot of good open source software, but the helpless point is that they developed the software is based onUnixwhen they most need an operating system,Linuxwas born, so from one birth,Linuxand theGUNIt's a perfect combination.

operation at the beginning is only as a monitoring program, development, it becomes a hardware based on the first layer of software, it is a bridge between the hardware and users, covering the underlying hardware complex implementation process, through a system call for the interface, to the upper program to provide services, and later for the convenience of development, The system calls are then encapsulated into a set of API functions.

This write the most is helpless, the system principle did not learn, the computer history name Company name also remember not clear, helpless, later must be bad back, and then re-write an article.

Linux based operating system