Introduction to AIX Systems

AIX is a UNIX system developed by IBM and is a dedicated operating system on IBM's RISC system/6000 computer. The industry has been rated as the best commercial UNIX system for many times. AIX is the abbreviation for Advanced Interactive EXecutive.

1. Development history of UNIX and AIX

The first UNIX operating system developed in Bell Labs in the late 60

The University of California, Berkeley, released their UNIX system in 1980.

IBM started using UNIX systems from 1985

1986 IBM Releases AIX first edition, used on RT6150 computer

1990 IBM launches RISC system/6000 and new AIX ver.3

1994 IBM launches AIX Ver 4.1

The AIX4.3 version is a 64-bit operating system that can run 32-bit and 64-bit applications at the same time. Can be run on any rs/6000 computer and remain binary compatible with the original AIX version.

AIX currently uses version 5.1 or later.

2, the main components of AIX

(1) Kernel (kernel)

Between the hardware device and shell (shell), the management of multiple processes, multi-user, management storage devices, control file access, most of the Kernel in C language, a small part of the compilation.

(2) file System (FileSystem)

Figure 1.2-1 AIX composition

AIX's filesystem has an inverted tree structure that typically includes three file types: normal files, directories, and special files (points to various peripherals attached to the system).

(one)/bin: System command files

(/etc): System files

(a)/dev: various device files

(/home): User Directory

(a)/tmp: Interim document

($)/usr: Execute command

(/var): Log information

(3) shell (shell)

The shell is the user interface of AIX, and there are three kinds of shells in Aix: Korn, Bourne, C, and the Korn shell is used in state. The Shell is also a command interpreter that is programmable to support the foreground or background operation of the application.