2. Getting Started with the Kernel
In this chapter, we introduce some of the basics of the Linux kernel: where to get its source, how to compile it, and how to install the new kernel. We then go over the differences between the kernel and user-space programs and common programming constructs used in the kernel. Although the kernel certainly is unique in many ways, at the end of the day it is little different from any other large software project.
Obtaining the Kernel Source
The current Linux source code is always available in both a complete tarball (an archive created with the tar command) and an incremental patch from the official home of the Linux kernel, http://www.kernel.org.
Unless you have a specific reason to work with an older version ...
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