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暂停mysql
service mysqld stop
忘记密码修改流程
1，修改mysql配置文件 /etc/my.cnf,在[mysqld]下添加一行skip-grant-tables
2, 重启mysql service mysqld restart
3, mysql -u root -p
不用输入密码就直接进入了mysql
mysql修改密码
use mysql
update user set Password = password('nf123456') where User = 'root';
添加用户
CREATE USER 'www5'@'%' IDENTIFIED BY 'nf123456';
给用户授权
GRANT ALL ON *.* TO 'www5'@'%';