PostgreSQL is a powerful open-source relational database known for extensibility, standards compliance, and support for advanced data types including JSON and arrays. The PostgreSQL Global Development Group maintains a dedicated APT repository with the latest releases. This guide installs PostgreSQL from the PGDG repository, secures the installation, and creates a database with a dedicated user. By the end, you'll have a hardened PostgreSQL instance with a working database ready for application use. Install PostgreSQL The PostgreSQL Global Development Group provides an official APT repository with the latest PostgreSQL releases. 1. Update the APT package index: $ sudo apt update Enter fullscreen mode Exit fullscreen mode 2. Install the PostgreSQL common package: $ sudo apt install postgresql-common -y Enter fullscreen mode Exit fullscreen mode 3. Run the repository setup script: $ sudo /usr/share/postgresql-common/pgdg/apt.postgresql.org.sh Enter fullscreen mode Exit fullscreen mode 4.…