Linux-based refers to operating systems that are built on the Linux kernel, which is the core part of the system that manages hardware and software interactions. These systems are open-source, meaning their source code is freely available for anyone to use, modify, and distribute. This has led to a wide variety of distributions, such as Ubuntu, Fedora, and Debian, each tailored for different user needs and preferences. Many servers, supercomputers, and embedded systems run on Linux-based operating systems due to their stability, security, and flexibility. Additionally, they are popular among developers and tech enthusiasts who appreciate the ability to customize their environments. Overall, Linux-based systems play a significant role in the technology landscape.