Here is a YouTube video about Bash Parameter Expansion, and is part of a growing collection of videos I have found to be useful if you are doing programming or coding and want good experience with Bash shell programming and scripts. The reason is working with techniques of parameter or variable expansion in Bash, which will greatly increase your scripting skills and understanding how to better utilize your computing power with Bash shell tools and coding.
This tutorial, "Bash Parameter Expansion" is free education you can watch, which will help you deepen your knowledge and be better prepared for IT certification exams, schoolwork, or efficiently running your computer at home or on your job. is important for mastering the essentials and getting your skills on the right track.