mysql -uroot -p123456
Warning: Using a password on the command line interface can be insecure.
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
mysqladmin -u root password '123456'
mysqladmin: connect to server at 'localhost' failed
error: 'Access denied for user 'root'@'localhost' (using password: NO)'
mysqladmin -u root -h 192.168.222.128 password '123456'
mysqladmin: connect to server at '192.168.222.128' failed
error: 'Host '192.168.222.128' is not allowed to connect to this MySQL server'
出现这样的错误。