On which server or platform was the PostgreSQL database installed?

PostgreSQL is usually installed on servers with Linux operating systems (such as Ubuntu, CentOS, Debian) or Windows, depending on the infrastructure.

In DevOps practices, virtual machines, containers (Docker), or cloud platforms (AWS, Azure, GCP) are often used to host the database.

For example, PostgreSQL can be deployed on:

• A virtual machine with Ubuntu
• A Docker container with the official PostgreSQL image
• A managed database service in the cloud (Amazon RDS, Google Cloud SQL)

The choice depends on requirements for scalability, fault tolerance, and ease of management.