sudo systemctl stop mariadb.service
sudo systemctl status mariadb.service
sudo mysqld_safe --skip-grant-tables --skip-networking &
mysql -u root
use mysql;
UPDATE user SET Password=PASSWORD("new password") WHERE User="root";
flush privileges;
exit;
sudo systemctl stop mariadb.service or sudo mysqladmin shutdown
sudo systemctl start mariadb.service
sudo systemctl status mariadb.service
mysql -u root -p