用户登陆
mysql -u user_name -p
修改密码
ALTER USER ‘root‘@‘localhost‘ IDENTIFIED BY ‘new_password‘;
关闭服务
D:\mysql-8.0.16-winx64\bin>mysqladmin -u root -p shutdown
OR
D:\mysql-8.0.16-winx64\bin>net stop mysql
开启服务
D:\mysql-8.0.16-winx64\bin>net start mysql
原文：https://www.cnblogs.com/zoneofmine/p/10779277.html