Leading IT trainer/author William (Bo) Rothwell first provides a clear and up-to-date introduction to the complex world of open source software, including its licensing arrangements and their associated tradeoffs. Next, Rothwell introduces essential skills for both Linux command line and GUI environments, emphasizing tools that developers need to create code in Linux, including text editors. Building on this knowledge, he introduces the primary languages used by Linux developers, from scripting tools such as Bash, Python and Perl to traditional full-fledged programming languages such as Java, C++, and C. Finally, Rothwell presents a full section on the powerful Git version control system, teaching skills that developers can use both in Linux and in many other environments."