Original edition by Mendel Cooper, dedicated to the Public Domain
An in-depth exploration of the art of shell scripting.
This tutorial assumes no previous knowledge of scripting or programming, yet progresses rapidly toward an intermediate/advanced level of instruction... all the while sneaking in little nuggets of UNIX® wisdom and lore. It serves as a textbook, a manual for self-study, and as 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.
This book is suitable for classroom use as a general introduction to programming concepts.
If you wanted to contribute or make corrections, please go to https://github.com/pmarinov/bash-scripting-guide