$ sudo apt-get install software-properties-common dirmngr apt-transport-https$ sudo apt-key adv --fetch-keys 'https://mariadb.org/mariadb_release_signing_key.asc'$ sudo add-apt-repository 'deb [arch=amd64,arm64,ppc64el] https://mirror.yongbok.net/mariadb/repo/10.5/ubuntu focal main' $ sudo apt update$ sudo apt install mariadb-server