1. 获取rpm

wget https://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm

2. 安装rpm

rpm -ivh mysql57-community-release-el7-9.noarch.rpm

3. 确认依赖文件

cd /etc/yum.repos.d
ls

        查看该文件夹下是否已存在如下两个文件

4. import mysql 的公钥到RPM的配置中

rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022

5. 在  /etc/yum.repos.d 下执行安装

yum install mysql-server

6. 获取安装时的临时密码

grep 'temporary password' /var/log/mysqld.log

7. 登录数据库

mysql -u root -p

8. 修改同级强度密码

alter user 'root'@'localhost' identified by 'Root@123456';

9. 修改密码强度策略

set global validate_password_policy=0;
set global validate_password_length=4;
flush privileges;

10. 更新超管密码

alter user 'root'@'localhost' identified by 'root';

11. 可远程连接配置

show databases;
use mysql;
show tables;
update user set Host='%' where User='root';
flush privileges;

12. 配置默认编码

vi /etc/my.cnf 

#添加
character_set_server=utf8
init_connect=‘SET NAMES utf8’

13. 重启

systemctl restart mysqld

14. 开机自启

systemctl enable mysqld