Comments - my.cnf
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When MariaDB (and mysql) are installed from scratch, no my.cnf file is installed.
You can see the search path for the my.cnf file by using the following command: sudo mysqld --help --verbose | grep cnf
The normal search path is: /etc/my.cnf /etc/mysql/my.cnf /usr/etc/my.cnf /.my.cnf
So create a /etc/my.cnf file. --- cut here --- [client] port = 3306
[mysqld] port=3306 --- end cut ---
Note that you are going to want to change other defaults. If you want to use InnoDB you must tune at least innodb_buffer_pool_size and innodb_log_file_size. If using MyISAM adjust key_buffer_size, read_buffer_size, key_cache_division_limit, etc.