Embedded Linux Primer: A Practical Real-World Approach

Several locations on the Web focus on Linux development. Here is a list of the most important websites for the various architectures and projects:

Primary kernel source tree

www.kernel.org

Primary kernel GIT repository

www.kernel.org/git

PowerPC-related development and mailing lists

http://ozlabs.org/

MIPS-related developments

www.linux-mips.org

ARM-related Linux development

www.arm.linux.org.uk

Primary home for a huge collection of open-source projects

http://sourceforge.net