Databases
MariaDB and MySQL: a working cheatsheet, storage engine conversions, and emergency recovery.
Guides for running MariaDB (and MySQL) on Avunu-managed servers, from everyday commands to recovering a server that won't start. Commands target MariaDB 10.11 and later unless a page says otherwise.
MariaDB and MySQL Cheatsheet: create users, change root authentication, check and optimize tables, dump single tables, and title-case text.
Recover Data from a MariaDB Server That Won't Start: forced InnoDB recovery, dumping, rebuilding the data directory, and restoring.
Convert Tables to a Different Storage Engine: move MyISAM or Aria tables to InnoDB (or another engine) in bulk.
This section is in the public domain (CC0 1.0), code samples included. Use it however helps you.