%general-entities; ]> This chapter creates a directory where the cross compiler toolchain wil be built and a directory where sources are kept. It includes a list of packages that need to be downloaded for building a basic Linux system. The listed version numbers correspond to versions of the software that are known to work, and this book is based on their use. We highly recommend not using newer or older versions because the build commands for one version may not work with another version. Download locations may not always be accessible. If a download location has changed since this book was published, Google () provides a useful search engine for most packages.