Shulou(Shulou.com)06/02 Report--

Education for Old Boys 66-introduction to system Service hardware

1. Responsibility of operation and maintenance personnel

1) make sure that the data is not lost

2) the server runs 24 hours a day.

3) improve the access experience of users

4. Basic common software

Resource search software everything screen sharing software Red Spider software

Problem 1: Starscream software network configuration is incorrect Adapter.exe-- modify network address 192.168.21.xxx

Question 2: red spider software jam ctrl+alt+del-start task manager-red spider software process-end data sharing software Feiqiu (no need to install and run directly) capture screen software Picpick drawing software remote assistance software TeamViewer sunflower mind mapping software xmind computer hardware description

Computer type

Desktop laptop server

Server classification: appearance score

Blade server with high performance-to-price ratio

Rack server to rack issu

Tower server for home use

Server classification: size classification

1U server

2U server

4U server

1U server indicates that the server height is 4.45cm

Server classification: performance classification

PC server x86 architecture

Minicomputer server IBM HP

four。 Server hardware components

CPU: operation processing, sending control instructions.

Fans: cooling

Memory: storing data information (temporary storage)

Hard drives: storing data information (permanent storage)

Motherboard: summarize and integrate all the hardware.

Power supply: power supply

Network card: to achieve information transmission, data transmission.

Display card: integrate multiple hard drives into one to increase the capacity of the hard disk.

Integrate multiple hard drives into one to increase disk performance.

Integrate multiple hard drives into one to improve disk security.

Use the display card to configure the disk configuration display (raid) process with different raid levels.

Raid0: advantages: improve storage efficiency disadvantages: data storage security is not high. Enterprises will not adopt the configuration of raio.

Raid1: advantages: improve storage security disadvantages: data storage performance is not high.

Raid2: advantages: high storage efficiency and high storage security. Cons: disk capacity is wasted.

6.2 as shown below:

Array on to improve storage performance

Note: only one disk can be broken

Process management card

1. The function of server hardware is summarized. There are various brands and models of the server. (configuration information)

Abroad, there are IBM, HP (Hewlett-Packard), DELL (Dell), SUN and other famous manufacturers

There are associations and waves in China.

Server hardware details

Remote management card: server shutdown status control service operation / remote network installation system

CPU: computing / hardware control

a. What is the number of CPU routes: the number of server CPU

b. What is CPU core: server CPU core number core processing server system task / parallel processing task capability

Memory: temporarily store data / may be lost

User stores data-CPU-- Storage data instructions-- > hard disk (mechanical hard disk)

CTO Supervisor / Manager (memory) New employee

CEO CEO

Chief Technology Officer of CTO

Chief operating Officer of COO

CFO Chief Financial Officer

Program: code information written by developers

Process: a running program will generate a process

Daemon: once it is running, it won't stop at all.

Buffering: buffer passengers (data)-queuing space-memory (buffer)-Metro space (hard disk storage) write buffering speeds up data writing

Cache: cache customer (beverage)-- Tang Shenghao to cup-- water bar is responsible for beverage read cache storage hot data to speed up data reading.

Hard disk: permanent data / guarantee that data will not be lost

Hard disk interface type: IDE-sata-scsi-sas (server hard disk mainstream interface)-PCI-E (server solid state disk interface)

Teapot (hard disk) spout (hard disk interface) tea (data)

Hard disk speed information: home computer: 5400Universe 7200

Enterprise server: 10k/15k

Hard disk storage capacity:

Storage unit: 1024Byte (section) = = 1KB 1024KB = = 1MB 1024MB = = 1GB

1024GB = 1TB 1024TB = = 1PB 1024PB = = 1EB 1024EB = = 1ZB

Power supply: power supply function

The server power supply should be redundant:

There will be multiple uninterruptible power supply systems on the server, UPS (10-60) generator bank.

Cabinet:

The cables connected to the server in the cabinet should be marked.

Finishing of server cables in cabinets

Hardware performance comparison

CPU-- > memory-- > network card-- > hard disk (solid state)-- > hard disk (mechanical)

How to store data in an enterprise

Large enterprises: concurrency comparison of big data's reading and writing efficiency

User data-write-> Save to memory (buffer)-fixed quantity-> Storage to hard disk

User data-read-> read from memory (cache) and stored to hard disk

User data-read-> read from memory (cache) Test redhat-release redhat official version

-- testing centos-- to release centos official version

Linux system deployment environment preparation

Computer hardware environment: CPU-i5 memory-8G + hard disk-500g

Prepare for the virtual environment: windows-vmware 12 windows-- 15 architecture 64-bit

Operating system 32-bit: memory recognition capacity up to 4G memory recognition

Operating system 64-bit: memory recognition capacity up to 128G

First step: install the vmware software-- next step-- enter the activation code OK

Step 2: create a virtual host-- purchase a desktop OK

Step 3: configure Virtualized Network Information OK

Linux system installation and deployment process

The first step: download the system image / get the system CD

Download a new mirror site: https://mirrors.aliyun.com/centos/7.6.1810/isos/x86_64/ Aliyun

Download History Mirror site: http://vault.centos.org/

CentOS-7-x86_64-DVD-1810.iso-- centos7.6 standard image file * *

CentOS-7-x86_64-DVD-1810.torrent-seed file, system image download is faster

CentOS-7-x86_64-Everything-1810.iso-centos7.6 full version image file

CentOS-7-x86_64-Everything-1810.torrent

CentOS-7-x86_64-LiveGNOME-1810.iso-centos7.6 demo image file

CentOS-7-x86_64-LiveGNOME-1810.torrent

CentOS-7-x86_64-LiveKDE-1810.iso-centos7.6 demo image file

CentOS-7-x86_64-LiveKDE-1810.torrent

CentOS-7-x86_64-Minimal-1810.iso-centos7.6 simplified image files used in university teaching

CentOS-7-x86_64-Minimal-1810.torrent

CentOS-7-x86_64-NetInstall-1810.iso-centos7.6 network installation image file

CentOS-7-x86_64-NetInstall-1810.torrent

Step 2: load the image file

Step 3: start the virtual host

PS: common errors:

The laptop does not have virtualization enabled.

Resolve:

Enter bios (basic input and output system)-- F2 F12 F1 DEL/Fn + F2 F12 F1 DEL-- find CPU configuration

Virtualization configuration-on

Step 3: follow the operating system

1) read the second interface to configure the network card name information centos6--eth0 (the first block) centos7--ens33

Select install centos7-- tab key-- bottom line input-- net.ifnames=0 biosdevname=0 supplement:

Windows-virtual host mouse click

Virtual host-windows ctrl+alt2) system configuration information

A configure network and host name information

B for system partition operation

/ boot Boot Partition Save and system Startup related data Information 200m

Swap swap partition temporarily uses hard disk space as memory usage reference memory capacity of 1.5g

Memory capacity = 8G swap partition size = 8G

/ Root zone will leave all space = = C disk

Supplement: when the linux system runs out of memory

1)。 Service process stops

2)。 Downmachine appears in the system

C there are two security-related configurations to turn off

3) software software configuration

Software selection

Minimize installation-1236 centos7

Minimize installation-235 centos6

Summary of course knowledge: system distribution system deployment environment physical hardware virtual environment system installation process network card name setting network card address configuration system partition process system software package installation

This week's assignment:

Word blog draws mind map

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