1、下载mysql8软件库

wget https://repo.mysql.com//mysql80-community-release-el8-3.noarch.rpm

2、安装软件库

rpm -ivh mysql80-community-release-el8-3.noarch.rpm

3、安装mysql

yum install mysql-server

4、启动mysql

systemctl start mysqld

systemctl enable mysqld

5、检查初始密码，目前看到是空密码

cat /var/log/mysql/mysqld.log | grep password

6、修改密码

mysq -uroot -p 

直接回车

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

7、修改root远程登录权限

use mysql;
update user set host='%' where user='root';
flush privileges;