linux simple to understand

Excerpt from Baidu Encyclopedia: UNIX operating system (Younis), is a powerful multi-user, multi-tasking operating system , supports a variety of processor architectures , according to the classification of the operating system, are time-sharing operating system , first proposed by KenThompson, Dennis Ritchie and Douglas McIlroy in 1969 at aT & T 's Bell labs developed. Currently its trademark owned by The Open Group, in line with only a single UNIX specification UNIX UNIX systems can use the name, otherwise it can only be called class UNIX (UNIX-like).

Linux is a free to use and free dissemination of Unix-like operating system , is based on POSIX and UNIX is a multi-user, multi-tasking , support for 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 has inherited Unix to network design as the core, it is a stable performance in multi-user network operating system . Linux operating system was born on October 5, 1991 (this is the first time officially made public). Linux, there are many different versions of Linux, but they all use the Linux kernel . Linux can be installed in a variety of computer hardware devices, such as mobile phones , tablet PCs , routers , video game consoles, desktop computers, mainframes and supercomputers.

linux's broad range of applications.

For example, it can be used as

　　　　1. Server system: web application servers, database servers, interface server, DNS, FTP, etc.

　　　　2. Embedded systems: routers, firewalls, mobile phone, PDA (handheld computer), IP sharing device, switches, home appliances microcomputer controller, etc.

　　　　3. The high-performance computing, compute-intensive applications: linux has a strong computing power

　　　　4. Desktop applications

　　　　The mobile handset system

linux version is divided into two types: kernel version and release version.

　　Kernel version: refers to the kernel version number of the group under the leadership of linuxs development and maintenance of the system kernel.

　　Release: refers to a number of organizations and companies depending on their own releases and self-defined.

linux mainstream version:

　　1.RedHat Linux

　　2kubnhu

　　3.CentOS: CentOs is one of the linux distributions.

centos redhat and systems are free, but Redhat linux service for a fee, centos each version of the services are free.

The basic idea is that linux: 1 everything is a file; 2 each software has a definite purpose...

A brief summary of linux features: it is multi-user, multi-tasking, rich network functionality, reliable system security, good portability, compatibility with a standard, a good user interface, good speed performance.

Probably a simple look at the detailed supplementary linux, behind.