Preparing the SQL database in SpamAssassin
Official SQL queries Choosing the right perl DataBase Interface (DBI) module DBD::mysql (github) DBD::MariaDB (github) Depending on whether you use MySQL or MariaDB, and if you use MySQL things depend also on the version, you have to install DBD::mysql or DBD::MariaDB perl DBI module. Other connectors...
Dovecot vpopmail-auth driver removal. Migrating to the SQL driver
Those who are still using the Dovecot's vpopmail auth driver should consider a migration to another backend, as on January 4, 2021 dovecot-2.3.13 was released and the vpopmail auth driver removed (more info here). I'll show below how to support domain aliases...
Running two php/mysql/mariadb versions on the same apache web server
In a web server very old applications must coexist with new ones. Usually old applications are no more mantained and still require old versions of php and mysql, while recent apps claim to use the latest features of your apache, php...
Installing mariaDB from source
Info: http://mariadb.org/ These days many different popular Linux distributions (at the time I'm writing Slackware, Fedora, Arch, OpenSuse, Gentoo among the others) are switching to mariaDB, replacing mysql as the default db server. mariaDB is a fork of mysql, created by the former ...