Shulou(Shulou.com)06/03 Report--

Day1

I. basic commonly used 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

Problem 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 billion map software remote assistance software TeamViewer sunflower mind mapping software xmind

II. Introduction of course knowledge

1. Hardware knowledge equipment

two。 Server component

3. The component details the number of CPU cores.

4. Data storage scheme in enterprise

III. 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

Description of the types of computer hardware

1. Computer type

Desktop laptop server

two。 Server classification: appearance classification

Rack server

High performance-to-price ratio space problem of blade server

Tower server for home use

3. Server classification: size classification

1U server

2U server

4U server

1U server indicates that the server height is 4.45cm

4. Server classification: performance classification

PC server x86 architecture

Minicomputer server IBM HP

Mainframe server cabinet Petroleum (address Exploration) Meteorological Bureau (Meteorological data Operation)

5. Hardware components of the server

CPU: operation processing transmission control refers to

Fans: heat dissipation

Memory: temporary storage of data information

Hard disk: permanent storage of data information

Motherboard: summarize and integrate all hardware

Power supply: power supply

Network card: realizing data transmission

Array cards: 1. The capacity of multiple hard drives can be integrated into one to increase disk capacity.

two。 The capacity of multiple hard drives can be integrated into one to increase disk performance

3. The capacity of multiple hard drives can be integrated into one to increase disk security.

Disk consolidation with array cards: configuring the array (raid) process

Configure different raid levels:

Raid0: advantages: improve data storage efficiency disadvantages: data storage security is not high enterprises will not adopt raid0

Raid1: advantages: improved storage security disadvantages: low storage efficiency

Raid5: advantages: high storage efficiency, high security, disadvantages: disk capacity will waste one disk capacity and can only break one hard disk.

VI. Summary of curriculum knowledge

1. Course introduction

two。 Description of computer type

3. Server hardware composition

4. Detailed description of hardware function

An array cards increase disk capacity, improve disk security and improve disk performance

Day2

1. Detailed description of server hardware

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, servers, CPU

B what is the CPU audit 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)-queued space-memory (buffer)-Metro space (hard disk storage) write buffer (accelerated data write buffer (memory))

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

Hard disk: permanently store data / ensure that data is not 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 (bytes) = = 1KB 1024KB = = 1MB 1024MB = = 1GB 1024GB = = 1TB

1024TB = 1PB 1024PB = = 1EB 1024EB = = 1ZB 1024ZB = = 1BT

Power supply: power supply function

Server power supply should be redundant: there will be multiple power supplies on the server. UPS (10-60) generators are often used in banks.

Cabinet: all the cables connected to the server in the cabinet should be marked.

Finishing of server cables in cabinets

2. Hardware performance comparison

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

3. 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-- 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

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

Step 3: configure the virtualized network information 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 file university teaching using 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.

Solution: 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

Add:

Windows-Virtual host mouse click (toggle)

Virtual host-windows ctrl+alt (switching)

2) system configuration information

a. Configure network and host name information

b. Perform 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

A Software selection

Minimize installation-1236 centos7

Minimize installation-235 centos6

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