Linux Kernel Crash Book：全面指南与必备调试教程

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《Linux Kernel Crash Book》是一本全面指导学习Linux内核崩溃调试的重要资源，由Igor Ljubuncic aka Dedoimedo撰写，可在dedoimedo.com网站获取。这本书适合那些希望深入了解Linux内核崩溃处理、核心转储（core dump）和网络转储（netdump）的系统管理员和技术人员。本书分为多个章节，详尽讲解了Linux Kernel Crash Dump (LKCD) 的工作原理、安装与配置步骤。在第一部分（Chapter 1 - LKCD介绍），作者解释了LKCD的工作流程，分为两个阶段：阶段1涉及启动时的行为，可能涉及检测和初始化，确保在系统出现异常时能够捕获核心转储；阶段2则关注于设置和配置，包括如何安装必要的软件包，以及如何配置dump设备、目录、级别、标志等参数。第二章（LKCD安装）着重于安装所需的工具和依赖，确保系统环境准备就绪。接着，第三章（LKCD本地转储过程）详细描述了配置本地核心转储的过程，包括选择合适的dump设备、设置dump目录、级别、压缩级别，以及额外的配置选项，如激活dump进程、指定运行时机等。对于网络转储（Chapter 4 - LKCD netdump过程），书中介绍了如何配置网络转储服务，包括安装必要的网络工具包，配置dump标志、源端口，以及确保接收转储数据的目录对特定用户具有写权限。第五章（配置LKCD网络转储服务器）进一步扩展了这一主题，包括网络服务器的配置细节。《Linux Kernel Crash Book》提供了一个实用且深入的指南，帮助读者掌握Linux内核崩溃时的核心转储和网络转储技术，这对于排查和修复系统故障、分析性能问题以及进行故障恢复至关重要。通过阅读这本书，无论是初学者还是经验丰富的Linux管理员都能提升自己的内核故障诊断能力。

Foreword

Writing books is not a new experience for me. I’ve been doing it since the age of 10.

Most of these books gather proverbial dust on this or that hard disk, others are being

pampered for limelight, others yet have been abandoned. There’s no better place to

announce the demise of one project as at the birth of another. As you may have guessed,

my super-extensive mother-of-all Linux topics book is not going to be published any time

soon, as simple system administration no longer excites me. The single Apache chapter

remains a proof-of-concept poetic demonstration, an orphan of what might have been.

Instead, I have started casting my eye toward more advanced, more complex topics. Like

Linux crash analysis. This is a subject that has lots of unanswered mail threads and plain

text documents scattered all over the place, inaccessible to almost everyone, save the

tiny percentage of super geeks. Whether this should be so or not makes no diﬀerence.

There comes a need, there comes a man with an idea, and that man writes a book.

My personal and professional interest in the last three years has taken me down the path

of Linux kernel secrets, all the way into assembly code, where magic happens. I felt the

desire to learn what happens in the heart of the system. Like most technical topics, there

was some information to be found online, but it was cryptic, ambiguous, partial, nerdy,

or just not there at all. Dedoimedo is a reﬂection of how things ought to be after all.

I’m writing guides and tutorials and reviews the way I perceive the world - friendly and

accessible toward normal human beings. In a way, every article is an attempt to make

things a little clearer, a little more understandable. Step by step, nothing omitted, you

know the mantra.

Linux kernel crash is no exception. If you’re familiar with my website, you know this book

is just a compilation of seven in-depth tutorials already posted and available freely for

everyone’s use. But there’s a diﬀerence between some HTML code, scattered around,

and a beautiful stylish book written in L

X. Not much diﬀerence, I admit, but still

worth this fancy foreword.

This book is a product of several factors. First, my ego demands recognition, so I’m

making the best eﬀort of appearing smart in the posh circles. Nothing like a book to

make you look wise and whatnot. Second, the book really makes sense, when you take

the entire crash series into consideration. Starting with crash tools via collection all the

way to analysis, plus some extras and general tips. It’s an entire world, really, and it

belongs inside a single, comprehensive volume. Third, half a dozen Dedoimedo readers

contacted me by mail, asking that I compile my crash material into one document. I did

hint at a possible PDF given popular demand, so here we go.

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