How To Use awk In Bash Scripting – nixCraft

https://www.cyberciti.biz/faq/bash-scripting-using-awk/

AWK is a programming language that is designed for processing text-based data, either in files or data streams, or using shell pipes. You can combine awk with shell scripts or directly use at a shell prompt.
Awk is an excellent tool for building UNIX/Linux shell scripts. I have successfully used AWK with very many bash scripts. Know this tool.