Stop MySQL server.
Start MySQL server with –skip-grant-tables:
mysqld_safe --skip-grant-tables &
Login (your password not need):
mysql -uroot
Fix privileges:
UPDATE mysql.user SET Grant_priv='Y', Super_priv='Y' WHERE User='root';
FLUSH PRIVILEGES;
Create root user, if need;
GRANT ALL ON *.* TO 'root'@'localhost'; GRANT ALL ON *.* TO 'root'@'%';
Update privileges:
FLUSH PRIVILEGES;
That’s all!