Installation of MySQL 8.0.23 under centos7

itread01 2021-01-23 20:26:04
installation mysql 8.0.23 centos7 centos

First of all, let's briefly introduce what is called MySQL;

In short, a database is a warehouse for storing data , For the convenience of data storage and management , It stores data on disk according to specific rules . To achieve a certain purpose , A collection of data organized according to certain rules ;

MySQL Is an open source relational database management system (RDBMS), Use the most common database management language -- Structured bai Query language (SQL) Database management . Through the database management system , It can effectively organize and manage the data stored in the database .

So our common database model :

1, Relational databases



SQL Server

2, Non relational database

2,1 File storage database MongDB

2,2 Key value storage database Redis Memcached

2,3 Column storage database HBase

2,4 Graphic database Neo4J

What are the questions about the interview in the company ?

1,SQL Statement operation database

2,SQL Statement operation table structure

3, The relationship between tables and classes The relationship between fields and attributes

The table corresponds to java Class in , It is used to store the data extracted from the database

Field name ( Column ) Consistent with member variable properties in class

The row in the table is based on the object created by the class

3,SQL Introduction of sentence :

MySql I don't know java, Then you need to interact , Need to know the language of the database

SQL Statements are data libraries

1. Environment

Virtual machines : centos7


① The first thing to do is to put MySQL Install the package

        MySQL Official website :

① ,

② ,

③ ,

④ ,

⑤ ,

Follow these steps to mysqi The compressed package has been downloaded to the computer

Next, turn on the virtual machine and use remote tools xshell Connect &CRT Connect . I use it here xshell

xshell6 Download the package

Link to :
Extraction code :qa62

Virtual machine is not introduced here , There are many ways to install virtual machines on the Internet
① Turn on the virtual machine and leave it alone ;

② Open it directly xshell Input IP Set up a remote connection

③ Input the user password

④ Successful login

3. The main course begins

Through  rpm -qa | grep mariadb Command view  mariadb Installation package for

② And then by order rpm -e mariadb-libs-5.5.56-2.el7.x86_64 --nodeps Uninstall mariadb

③ And then through rpm -qa | grep mariadb Look at mariadb

④ Through  cd /usr/local/ Command into the root directory usr Under directory local Catalog , This directory contains some local shared resources

⑤ Through  ll Take a look at the directory structure

⑥ Through  mkdir mysql command Create a directory named mysql Contents of , And ll Take a look at the new mysql Catalog

⑦ Through cd mysql Enter mysql Catalog , Again ll Take a look at the directory structure

⑧ And then through rz The command was downloaded before it was uploaded mysql Data package

⑨ Upload completed

A And then through ll View the current directory structure

B Through tar -xvf mysql-8.0.11-1.el7.x86_64.rpm-bundle.tar  Command decompression  tar package

C Through clear Order clear the screen

D Through  rpm -ivh mysql-community-common-8.0.11-1.el7.x86_64.rpm --nodeps --force Command installation  common

E Through  rpm -ivh mysql-community-libs-8.0.11-1.el7.x86_64.rpm --nodeps --force  Command installation  libs

F , . Through  rpm -ivh mysql-community-client-8.0.11-1.el7.x86_64.rpm --nodeps --force  Command installation  client

G Through  rpm -ivh mysql-community-server-8.0.11-1.el7.x86_64.rpm --nodeps --force  Command installation  server


H Through rpm -qa | grep mysql View installed mysql Resources

I Enter the following command

mysqld --initialize initialization

chown mysql:mysql /var/lib/mysql -R Authorization
systemctl start mysqld Turn on mysql Service
systemctl status mysqld Look at mysql Status
J Through cat /var/log/mysqld.log | grep password Look at root Initial password

K Use root User login mysql , And modify root User password

mysql -u root -p # Enter and enter the initial password, which is The initial password viewed above ( Fill in your own password )

Then enter alter user "root"@"localhost" identified by "Aa123456";             # Change password (Aa123456 The password you set for yourself can be changed at will )

L And then exit sign out Verify the password


M By the following command , Authorization for remote access

create user 'root'@'%' identified with mysql_native_password by 'Aa23456';    
grant all privileges on *.* to 'root'@'%' with grant option;
flush privileges;      # Immediate effect

N Through  ALTER USER 'root'@'localhost' IDENTIFIED BY 'root' PASSWORD EXPIRE NEVER; Command to modify the encryption rules ,MySql8.0 edition and 5.0 The encryption rules are different , Now the visualization tools only support the old encryption method .

O Through  flush privileges; Order to rearrange the license after the repair

P ,

By the following order , Shut down firewall

systemctl stop firewalld.service;
systemctl disable firewalld.service;
systemctl mask firewalld.service;

Q Through  yum -y install iptables-services  Command installation iptables Firewall


R Start and set the firewall through the following command

systemctl enable iptables;
systemctl start iptables;

S Through vim /etc/sysconfig/iptables Command edit firewall , New port

-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 8090 -j ACCEPT

U Through  systemctl restart iptables.service Command to restart the firewall for the configuration to take effect


V Through  systemctl enable iptables.service Command to set the firewall to boot

W Through  ifconfig Command view ip

X New  SQLyog  Connection of

SQLyog My bag

Link to :
Extraction code :qa62

Y The connection is successful

Z Use the command show databases; View all databases

MySQL The installation is over , But this is just the beginning There are still many orders to add, delete, change and search come on. .



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