Final answer:
The Linux 'uname' command displays system information including the kernel name and version, machine name, processor and hardware platform. Linux, known for adaptability and configurability, is the predominant OS for top-performing supercomputers.
Step-by-step explanation:
The Linux uname command displays basic information about the system's software and hardware. Specifically, it can provide details such as the kernel name, hostname, kernel release, kernel version, machine hardware name, processor architecture, hardware platform, and the operating system. Typically, this command is utilized by users and administrators to quickly understand the environment they are working with, including what kernel is in use or the architecture type of the hardware.
Since its creation by Linus Torvalds, Linux has become a widely adopted open-source operating system, known for its free distribution and configurability. It powers an expansive range of systems from PCs to supercomputers, and it's favored in many applications for being cost-effective, robust, and flexible. This adaptability and performance have placed Linux at the forefront of technology, making it the operating system of choice for the top 500 supercomputers worldwide.