This is a step by step beginner guide to shell scripting in LINUX (bash)
The content has been taken from Ryan's Tutorials but implemented by me.
I would suggest you to clone this repo to your system (UNIX-like) so that you can easily implement and experiment with the scripts in your favourite terminal. This would also help since there are some scripts that rely on other scripts. if some script on execution says permission denied make sure that you have allowed the script to run as executable.
Start here.