Originally published at: https://www.cyberciti.biz/faq/how-to-install-lamp-on-debian-10-buster/
How do I install a LAMP stack on Debian 10 (Buster)?
It’s a very useful article for a LAMP installation, but for logging in as root, mysql/mariadb requires sudo privileges:
sudo mysql -u root -p
Otherwise the login will be denied.