1. first sudo mysql
sudo mysql -u root
2. check present db
select user, host from mysql.user
3. delete current 'root'@'localhost'
drop user 'root'@'localhost';
4. recreate root
create user 'root'@'localhost' identified by '';
5 Give permission
grant all privileges on *.* to 'root'@'localhost' with grant option;
flush privileges;
