What type of kernel is Debian based on?

Debian operating system is built based on the Linux kernel. The Linux kernel is an open-source Unix-like kernel created by Linus Torvalds in 1991. It provides essential core functions for the operating system to run, including process management, memory management, device drivers, and file systems. The Debian distribution combines the Linux kernel with GNU tools and other free software packages to form a complete operating system. Debian uses a stable Linux kernel as its default kernel and regularly updates to support new hardware and features. By utilizing the Linux kernel, Debian is able to offer a stable, secure, and highly customizable operating system environment to meet various user needs and applications. Therefore, Debian can be seen as a versatile and flexible operating system distribution based on the Linux kernel.