Linux Notes 1

Von. Neumann architecture: Arithmetic, controller, memory, output device, input device

Database server: Oracle, sun,mysql,mariadb

Server shape classification is divided into three categories: Tower type, rack type, blade type

Most commonly used for rack-mounted servers

Rack-Mount Rack Server Specifications:

19 inch width, height in U, u=1.75 inch = 44.45 mm

There are usually several standard 1u.2u.3u.4u.5u.7u

Cpu:cental Processing Unit CPU, composed of controllers and operators

Companies that produce server CPUs:

Inter:xeon Xeon, Itanium itanium®

Amd:althlon MP

Ibm:power

Mainstream is CPU in inter format

Clock frequency: CPU operation of the respective frequencies

FSB: The operating frequency of the system bus, the CPU and the external Exchange data, the operating clock frequency of the instruction

Frequency multiplier = Main frequency/FSB

CPU Type:

X86

X64 (CISC)

ARM (Acorn RISC machine)

m6800,m68k (Moto)

Power (IBM)

Powerpc (Apple, Ibm,moto)

Ultrasparc (Sun)

Alpha (HP)

Itanium (Compaq)

Bit bit b

1byte byte = 8 bit B

-bit

2^10 1024=1k

2^20 1024k=1m

2^30 =1g

2^40 =1t

2^50 =1p

2^60 =1e

2^70 =1z

2^80 =1y

2^90 =1b

Differentiated by CPU architecture, servers fall into two categories:

Non-X86 server: Using RISC (compact instruction set)

X86 server: Using CISC (copy instruction set)

BIOS: Basic input/output system basic-input outputs systems

Storage network:

DAS: Direct Link Storage

NAS: Network-attached storage

SAN: Storage Area Network

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Software section:

Software Run interface: Follow Abi

Software Development interface: Follow API

Server three major major operating systems:

Window,unix Linux

Linux Origins:

1984: Richard Stallman launches the gun project

1991: Linus Torvalds releases Linux

Linux operating system:

Linux kernel +gun tool = Complete Unix-like operating system

Example: centos.ubuntu,android

Linux distributions:

Slackware

Debian

Redhat

ArChlinux

Gentoo

Lfs:linux from scratch

Android

http://futurist.se/gldt/

Open Source: Software and source code available to everyone

Source code for free distribution software

Ability to modify and create derivative works

Author's code Perfect

Software classification: Business sharing freedom

Open Source Agreement:

GPLv2,GPLV3,LGPL

Apache:apache

Bsd:bsd

Mozilla

Apache

MIT

The philosophical thinking of Linux:

1. Everything is a file (including hardware)

2. Small, single-use program >> Small and fine

3. link files to complete complex tasks together

4. Avoid confusing user interfaces

5. Configuration data stored in text

Get Hair line version:

Centos

Http://wiki.centos.org/Download

Http://mirrors.aliyun.com

Http://mirrors.sohu.com

Http://mirrors.163.com

Mbr:

Primary partition: One disk cannot exceed four, less than one

Extended partition: Up to one on a hard disk, plus a maximum of four primary partitions,

/dev/sda1-4

Logical Division area:/dev/sda5+

Linux Notes 1