What is most supercomputers use the ________ operating system.?

Most supercomputers use the Linux operating system. Linux is preferred because of its open-source nature, which allows for easy customization and optimization for specific supercomputing tasks. Additionally, Linux is known for its stability, security, and scalability, making it a popular choice for high-performance computing environments. Many of the world's fastest supercomputers, such as those listed on the TOP500 list, run on Linux.