将 mariaDB 换成MySql

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#先下载

    wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm

#安装

    yum -y install mysql57-community-release-el7-10.noarch.rpm

    yum -y install mysql-community-server

#启动

    systemctl start  mysqld.service

#开机自起

    systemctl enable mysqld

#查看状态

    systemctl status mysqld.service

#找到密码

    grep "password" /var/log/mysqld.log

#修改密码

    mysql -uroot -p

    ALTER USER 'root'@'localhost' IDENTIFIED BY 'new password';

#允许远程访问

    grant all privileges on *.* to 'root'@'%' identified by 'password' with grant option;

    flush privileges;

    exit

#开启防火墙

    firewall-cmd --zone=public --add-port=3306/tcp --permanent

    firewall-cmd --zone=public --add-port=8080/tcp --permanent

    firewall-cmd --reload

# 注意，结束前需修改my.cnf语言