Ultimate Linux Shell Scripting Guide : by Donald A. Tevault

The Ultimate Linux Shell Scripting Guide: Automate, Optimize, and Empower tasks

The Ultimate Linux Shell Scripting Guide: Automate, Optimize, and ... Paperback

Shell Scripting : How to Automate Command Line Tasks Using Bash Scripting and...

The Ultimate Linux Shell Scripting Guide: Automate, Optimize, and Empower tasks

Shell Programming and Bash Scripting: Ultimate Beginners Guide Book

The Ultimate Linux Shell Scripting Guide: Automate, Optimize, and Empower tasks

Linux Command Line and Shell Scripting Bible by Richard Blum: Used