Creating substrings in Bash - Basic String Manipulation - You Suck at Programming #045

Bash printf - substring & replacement

How to match substring with string in Bash? (2 Solutions!!)

String Manipulation in Bash – Slice, Replace & Transform Without External Commands!

Bash Strings: No Files Needed

Bash Scripting Deep Dive: From Shortcuts to Production Scripts

How would I write a script in bash to check if grep finds needed string?