步骤1：下载并安装mysql的yum repository
wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm
步骤2：使用yum安装mysql
yum -y install mysql57-community-release-el7-10.noarch.rpm
yum -y install mysql-community-server
步骤3：启动数据库
systemctl start mysqld.service
步骤4：检查数据库状态
systemctl status mysqld.service
步骤5：查找数据库初始密码
grep "password" /var/log/mysqld.log
步骤6：连接数据库
mysql -u root -p
步骤7：修改数据库初始密码（注意密码组成规范）
ALTER USER 'root'@'localhost' IDENTIFIED BY 'new password';
步骤8：卸载mysql yum
yum -y remove mysql57-community-release-el7-10.noarch
参考文章：
https://www.cnblogs.com/shuo1208/p/11237713.html
