Can anyone suggest good resourses for learning shell scripting from beginner to expert

I watched almost like 5 or 6 videos but I am not able to make concepts whole.
Please suggest some good resources for shell scripting

Apart from the cheatsheets provided, this course will give you a base for working with shell commands. Going forward after that, I’d suggest learn on the go rather than to spend time learning different commands.

These are very basics.Can you please suggest some documentation on a website.I want to learn parsing data by mixing cut awk grep commands.