安装mysql

MySQL YUM源
rpm -Uvh http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm

安装MySQL
yum -y install mysql-community-server

启动MySQL服务

systemctl start mysqld

设置MySQL服务开机自启动

systemctl enable mysqld

查看/var/log/mysqld.log文件，获取root用户的初始密码

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

登录数据库

mysql -uroot -p

修改密码

set global validate_password_policy=0;  #修改密码安全策略为低（只校验密码长度，至少8位）。
ALTER USER 'root'@'localhost' IDENTIFIED BY '12345678';

授予root用户远程管理权限

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '12345678';