chapter 1 the linux kernel
Автор: CodeMind
Загружено: 2025-06-13
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Chapter 1: The Linux Kernel - A Deep Dive
This tutorial provides a detailed overview of the Linux kernel, covering its fundamental concepts, architecture, key components, and how it interacts with the operating system and hardware. We will also include code examples (primarily snippets in C) to illustrate key functionalities.
*I. What is the Linux Kernel?*
At its core, the Linux kernel is the *heart* of a Linux-based operating system (OS). It's the lowest level of software that interacts directly with the computer's hardware. It acts as a bridge, or an intermediary, between applications running in user space and the hardware resources of the system (CPU, memory, disk drives, network interfaces, etc.).
*Key Responsibilities of the Linux Kernel:*
*Process Management:* Creating, scheduling, and terminating processes.
*Memory Management:* Allocating and managing memory for processes, including virtual memory.
*File System Management:* Providing an interface to access and manage files and directories.
*Device Drivers:* Providing a standardized interface for software to interact with hardware devices.
*System Calls:* Providing a set of functions that user-space programs can use to request services from the kernel.
*Security:* Implementing security policies to protect the system from unauthorized access.
*Networking:* Managing network communication and protocols.
*II. Kernel Architecture: Monolithic with Modules*
The Linux kernel is classified as a **monolithic kernel**. This means that most of the kernel's services (e.g., memory management, file system management, device drivers) run in a single address space (kernel space). This allows for fast communication between different parts of the kernel.
However, the Linux kernel also incorporates the concept of **modules**, which allows parts of the kernel to be loaded and unloaded dynamically while the system is running. This is a crucial feature that adds ...
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