MongoDB is a document database that stores data as flexible JSON-like documents instead of fixed rows and columns. It is commonly used for web applications, REST APIs, content management systems, and real-time analytics where the data model changes frequently. This tutorial walks through installing MongoDB Community Edition on Ubuntu 24.04, enabling authentication, creating an admin user, creating an application database user, testing basic CRUD operations, and securing access with UFW. Prerequisites You will need: An Ubuntu 24.04 VPS or cloud server SSH access A non-root user with sudo privileges UFW installed and configured At least 2 vCPU and 4 GB RAM for a comfortable MongoDB setup Step 1 — Add the MongoDB Repository MongoDB is not included in Ubuntu 24.04's default repositories. To install the latest stable MongoDB Community Edition packages, add the official MongoDB APT repository.…