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

First, the 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

Second, basic common software

1. Resource search software everything

two。 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: Starscream software crashes ctrl+alt+del-- start task manager-- Starscream software process-- end

3. Data sharing software Feiqiu (no need to install and run directly)

4. Screen capture software Picpick

5. Drawing software Yitu software

6. Remote assistance software TeamViewer sunflower

7. Mind mapping software xmind

Third, the description of computer hardware.

1, computer type

Desktop laptop server

2. Server classification:

Appearance classification:

Rack server

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

Tower server for home use

Size classification

1U server

2U server

4U server

1U server indicates that the server height is 4.45cm

Performance classification

PC server x86 architecture

Minicomputer server IBM HP

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

Fourth, the hardware components of the server

CPU: operation processing, sending control instructions.

Fans: cooling

Memory: storage data information network card (temporary)

Hard drives: storing data information (permanent)

Motherboard: summarize and integrate all hardware

Power supply: power supply

Network card: to achieve information transmission, data transmission.

Array cards:

Function:

Multiple disks can be consolidated into one to increase disk capacity.

Multiple disks can be consolidated into one piece to increase disk performance.

Multiple disks can be integrated into one piece to improve disk security.

Using array cards to configure different raid levels in the disk consolidation configuration array (raid) process

Raid0: advantages: improve storage efficiency, disadvantages: data storage security is not high. Enterprises will not adopt the configuration of raid0.

Raid1: advantages: improve storage security. Disadvantages: data storage efficiency is not high.

Raid5: advantages: high storage efficiency and high storage security. Disk capacity will be wasted

The figure shows:

Note: only one disk can be broken!

1. The function of server hardware is summarized.

two。 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.

one。 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, 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)

Example: CTO supervisor / manager (memory) new employee

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.

Buffer: buffer passengers (data)-queuing space-memory (buffer)-write buffer in subway space (hard disk storage)

Speed up data writing.

Cache: cache customer (beverage)-- Tang Shenghao to cup-- water bar is responsible for making beverage read cache and storing hot spot data.

Speed up data reading.

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

Storage unit: 1024Byte (bytes) = = 1KB 1024KB = = 1MB 1024MB = = 1GB 1024GB = = 1TB 1024TB==1PB 1024PB==1EB 1024EB==1ZB 1024ZBTB =.

Power supply: power supply function

The server power supply should be redundant:

1. There will be multiple power supplies on the server

two。 Uninterrupted power supply system UPS (10-60)

3. Generator bank

Cabinet:

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

Finishing of server cables in cabinets

two。 Hardware performance comparison

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

three。 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-Test 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 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 website: 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

A Software selection

Minimize installation-1236 centos7

Minimize installation-235 centos6

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