PostgreSQL is an open-source, advanced Relational Database Management System (RDBMS) designed for managing various data tasks. It uses Structured Query Language (SQL) to handle data in both small and large applications, including analytical systems, GIS, healthcare apps, and dynamic web applications. This article walks you through installing PostgreSQL on an Ubuntu 20.04 server, enabling the database server, and securing it for production use. Before you begin: * Have an [Ubuntu 20.04 server](ht......