Access denied for user ‘debian-sys-maint’

While trying to start or stop MySQL I get:

1	Access denied for user 'debian-sys-maint'@'localhost' (using password: YES)

Dabian has a own way to login to the MySQL database the credantials are listed in a file:

cat /etc/mysql/debian.cnf
[...]
user = debian-sys-maint
password = bodCNLUx0GGYm6F

Logon:

1	mysql -u root -p

Execute:

1	GRANT ALL PRIVILEGES ON . TO 'debian-sys-maint'@'localhost' IDENTIFIED BY 'bodCNLUx0GGYm6F' WITH GRANT OPTION;

By the way set a new root passwort:

1	mysqladmin -u root password 'new-password'