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→MySQL
== MySQL ==
MySQL is used to allow storage and retrieval of structured data. SQL is used by countless services for all kinds of use cases. Again we won't spend much time learning the details of MySQL configuration but you need a basic server set up. You may remember setting up MySQL from OPS235 - we're doing the nearly identical thing here.
Install MySQL. You may notice that it's actually called MariaDB now. They are two separate projects run by different stakeholders but they are compatible so you can use documentation from one to configure the other.