Hvordan nulstiller jeg root-adgangskoden i MySQL 8.0.11?

som her siger:

1.hvis du er i skip-grant-tables-tilstand
i mysqld_safe:

UPDATE mysql.user SET authentication_string=null WHERE User='root';
FLUSH PRIVILEGES;
exit;

og derefter i terminal:

mysql -u root

i mysql:

ALTER USER 'root'@'localhost' IDENTIFIED WITH caching_sha2_password BY 'yourpasswd';

2.ikke i skip-grant-tables-tilstand
kun i mysql:

ALTER USER 'root'@'localhost' IDENTIFIED WITH caching_sha2_password BY 'yourpasswd';