/etc/mysql/debian.cnf

USE mysql;
INSERTINTO`user`(`Host`,`User`,`Password`,`Select_priv`,`Insert_priv`,`Update_priv`,`Delete_priv`,`Create_priv`,`Drop_priv`,`Reload_priv`,`Shutdown_priv`,`Process_priv`,`File_priv`,`Grant_priv`,`References_priv`,`Index_priv`,`Alter_priv`,`Show_db_priv`,`Super_priv`,`Create_tmp_table_priv`,`Lock_tables_priv`,`Execute_priv`,`Repl_slave_priv`,`Repl_client_priv`,`Create_view_priv`,`Show_view_priv`,`Create_routine_priv`,`Alter_routine_priv`,`Create_user_priv`,`ssl_type`,`ssl_cipher`,`x509_issuer`,`x509_subject`,`max_questions`,`max_updates`,`max_connections`,`max_user_connections`,`authentication_string`-- MariaDB)VALUES('localhost','debian-sys-maint',
	password('PASSWORD-HERE'),'Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','N','N','N','N','N','','','','',0,0,0,0,'');

UPDATE`user`SET`password`=PASSWORD('PASSWORD-HERE')WHERE`user`='debian-sys-maint';
FLUSH PRIVILEGES;

mysql -uroot -p mysql < restore-debian.sql