1. 安装mysql5.7 yum 源

yum install http://repo.mysql.com/mysql57-community-release-el7.rpm

2. 检索之前安装的mysql

 rpm -qa | egrep “mariadb|mysql”

rpm -e mariadb* --nodeps

如有自行删除

3. 安装mysql服务

yum install mysql-server -y

4. 找mysql初始密码

grep 'root@localhost' /var/log/mysqld.log

5. 修改root密码

alter user 'root'@'localhost' identified by "Junjun@2021!"

这里安全策略未做修改，请复杂一些

6. 给root赋予远程访问权限

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

到此完成 仅作为笔记使用，如有错误，请略过*