First I installed aptitude. Then I ran the command to install mysql-server via aptitude. It followed a long list of packet related text.
Summary: Twelve new packets are going to be installed. Some packets have unfulfilled dependencies. Some mySQL packets collide with some mariadb packets and vice versa. Some packets are damaged. Three mariadb packets should be uninstalled. Accept this solution? I agreed.
Twelve new packets are going to be installed and nine are going to be uninstalled. I agreed.
Back to @erikvanberkum’s suggestion from March, 12th: I ran
sudo mysql
and got a mysql propt
Welcome to the MySQL monitor. Commands end with ; or \g.
[...]
mysql>
So that looks much better now. I ran the suggested SELECT command and got this output:
What is next?