If you read Japanese, you might have seen the book “Design and Implementation of Microkernels” by [Seiya Nuda]. An appendix covers how to write your own operating system for RISC-V in a… ...

While the average user might not be concerned with the option to make alterations to their OS, this functionality of Linux helps to explain why this operating system doesn’t cost you anything.

The purpose of a kernel is to manage the deepest levels of an operating system. It handles requests from hardware devices such as keyboards, schedules tasks, and manages files and memory.