下载并安装MySQL官方的 Yum Repository

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

启动服务，获取默认密码

systemctl start  mysqld.service

systemctl status mysqld.service

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

 

登录mysql，修改密码

mysql -uroot -p

修改密码

ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';

ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

会提示密码不符合安全要求，修改安全要求（实际环境别这么干）

set global validate_password_policy=0;
set global validate_password_length=6;

修改密码并配置非本机访问

ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
grant all privileges on *.* to 'root'@'%' identified by '123456' with grant option;