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Docker networking allows containers to communicate with each other, the host machine, and the outside world. It plays a key role in how data flows between services in a containerized application.

A container is a lightweight, standalone, and executable piece of software that packages everything needed to run an application — including the code, libraries, dependencies, and settings — into one neat unit.

User management in Linux means creating, modifying, and deleting user accounts on the system. It includes setting usernames passwords, and assigning users to groups.