1.關閉正在執行的MySQL
2.啟動MySQL的安全模式,命令如下:

mysqld --skip-grant-tables

or

mysqld-nd --skip-grant-tables

mysql -u root -p

use mysql

select user,host,password from user where user="root"

update user set password=PASSWORD("your_password") where user="root"

update user set password=PASSWORD("your_password") where user="root" and host="localhost"

SET PASSWORD = PASSWORD('cleartext password');

修改bob使用者在%.example.org位置上的登陸密碼,注意這裡的host地址%.example.org是必須要存在的

SET PASSWORD FOR 'bob'@'%.example.org' = PASSWORD('cleartext password');

GRANT USAGE ON *.* TO 'bob'@'%.example.org' IDENTIFIED BY 'cleartext password';

flush privileges;

注: