The document discusses the Linux kernel architecture. The kernel manages resources and arbitrates access between users and applications. It includes functions like file systems, process management, device drivers, memory management, and networking. The kernel space runs kernel processes while the user space runs user applications, which interact with the kernel through system calls. The kernel presents a consistent view of data stored on devices using a virtual file system.

1. Linux Kernel Architecture

5. The fundamental architecture of the GNU/Linux

9. Kernel Functional Overview

10. Functional Layer & Architectural Layer User Space System Call Hardware MM PM Net DM FS

19. Linux network layers The network subsystem allows Linux systems to connect to other systems over a network. The network subsystem abstracts implementation details of network devices and protocols