Get the advance skills

What you'll learn
Master the creation and usage of functions to modularize scripts.
Learn how to create and leverage libraries for code reuse and maintainability.
Explore the power of sed and awk for text manipulation, data extraction, and file transformations.
Develop complex sed and awk scripts to automate various tasks.
Gain proficiency in regular expressions, a vital skill for pattern matching and text searching.
Apply RegEx in scripts to process and manipulate data efficiently.
Learn how to automate interactions with graphical user interfaces (GUIs) using tools like xdotool or AutoIt.
Create scripts that interact with GUI elements, simulate user actions, and streamline repetitive tasks
Deepen your understanding of sed with advanced techniques like branching, looping, and multi-line processing.
Apply sed to solve complex text manipulation challenges.
Explore advanced gawk features, including user-defined functions, associative arrays, and custom output formatting.
Use gawk to process structured data and generate reports.

Requirements
Basic knowledge of Linux and familiarity with fundamental shell scripting concepts.
Completion of an introductory Linux shell scripting course is recommended.

https://www.udemy.com/course/linux-shell-scripting-advanced/