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Problems installing MariaDB

I have not used a relational database since dBASEII was current.
About a year ago I attempted to install MariaDB but didn't find tutorial which was a close enough match to my system.

I found (and attempted to follow) instructions at:

I successfully did:
   apt-get install software-properties-common
   apt-get install mariadb-server mariadb-client

*BUT* both references auto-magically go to a GUI setup screen.
I'm using Debian 9 with MATE.
I don't find anything related on the Applications nor System menus.
Help please.