Ubuntu 14.04/16.04/18.04 LTS (recommended)
Red Hat Enterprise Linux 6.5/7 (recommended)
Debian 8 (Jessie), 9 (Strech)
SUSE Linux Enterprise Server 11 with SP3 & 12
openSUSE Leap 42.1+
CentOS 6.5/7
Database
MySQL or MariaDB 5.5+ (recommended)
Oracle Database 11g (only as part of an enterprise subscription)
PostgreSQL 9/10
SQLite (only recommended for testing and minimal-instances)
Webserver
Apache 2.4 with ``mod_php``, ``php-fpm`` (recommended)
nginx with php-fpm