Interezante para mantener al dia el motor de base de datos.
sudo apt-get install software-properties-common gnupg-curl
sudo apt-key adv --fetch-keys 'https://mariadb.org/mariadb_release_signing_key.asc'
sudo add-apt-repository 'deb [arch=amd64,arm64,i386,ppc64el] http://mirrors.piconets.webwerks.in/mariadb-mirror/repo/10.5/ubuntu xenial main'
sudo apt update
sudo apt-get install mariadb-server