A Linux distribution is an operating system built on the Linux kernel, which is the core part of the system that manages hardware and software resources. Distributions package the kernel with various software applications, libraries, and tools, providing users with a complete operating system experience. Each distribution can cater to different needs, such as general use, server management, or specialized tasks. There are many popular Linux distributions, including Ubuntu, Fedora, and Debian. Each has its own features, user interface, and package management system, allowing users to choose one that best fits their requirements. This diversity makes Linux versatile and adaptable for various computing environments.