Advanced Bash Scripting Guide 5.0

This tutorial assumes no previous knowledge of scripting or programming, but progresses rapidly toward an intermediate/advanced level of instruction . . . all the while sneaking in little snippets of UNIX wisdom and lore.
Advanced Bash Scripting Guide serves as a textbook, a manual for self-study, and a reference and source of knowledge on shell scripting techniques.
The exercises and heavily-commented examples invite active reader participation, under the premise that the only way to really learn scripting is to write scripts.
Enhancements:
- This release adds a cross-linked index (the final missing critical feature in this project), other new material (including a new appendix and a couple of new example scripts), and bugfixes.
- This is an important update.