Linux is a free to use and free dissemination of Unix-like operating system, is a POSIX and UNIX-based multi-user, multi-task support multi-threading and multi-CPU operating system. It can run major UNIX software tools, applications, and network protocols. It supports 32-bit and 64-bit hardware .Linux inherited the Unix design ideas to the network as the core, is a stable performance in multi-user network operating system.
Linux operating system was born on October 5, 1991 (the first official announcement out this time) .Linux there are many different versions of Linux, but they all use the Linux kernel can be installed in each .Linux kinds of computer hardware devices, such as mobile phones, tablet PCs, routers, video game consoles, desktop computers, mainframes and supercomputers.
Strictly speaking, Linux is only the word itself represents the Linux kernel, but in fact it has been used to describe the use of Linux in the entire Linux-based kernel, the GNU project and use the operating system tools and databases.
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Linux's key features:
- The basic idea
The basic idea of Linux there are two points: first, everything is a file; second, the use of which the first is detailed in terms of all systems of every software has determined are attributed to a file, including commands, hardware and software, operating system, processes, etc. for the operating system kernel, the file is considered to have their own characteristics or type. As for the Linux is a Unix-based, largely also because the basic idea is very similar to both.
- Free
Linux is a free operating system, users can get for free online or by other means, and its source code can be modified. This is the other operating systems can not. Because of this, many programmers from around the world participated in the modification of Linux, the preparation, the programmer can be changed according to their interests and inspiration, which makes the Linux absorbed the essence of many programmers , has grown.
- Fully compatible with standard POSIX1.0
This makes it possible to program the simulator to run through the corresponding common DOS window under Linux's. This transfer window for the user from the Linux foundation. Many users consider the use of Linux, think of whether common procedures previously in the normal operation of Windows, which eliminates their concerns.
- Multi-user, multi-tasking
Linux supports multiple users, each user for their file device has its own special rights to ensure that independently of each other among users. Multitasking is now a major feature of the computer, Linux allows multiple programs are running simultaneously and independently.
- Good interface
Linux has both character and graphical interfaces. To operate in the character corresponding to the user interface, instructions may be input through a keyboard. It also provides a system similar to the Windows graphical interface of the X-Window, the user can use the mouse to manipulate. In the X-Window environment on the window and similar can be said to be a Linux version of the Windows operating system.
- It supports multiple platforms
Linux can run on multiple hardware platforms, such as with a platform x86,680x0, SPARC, Alpha and other processor. Also for Linux is an embedded operating system that can run on handheld computers, set-top boxes or game consoles. January 2001 release of the Linux 2.4 kernel has been able to fully support Intel 64-bit chip architecture. At the same time Linux also supports multi-processor technology. A plurality of processors simultaneously, greatly improving system performance.