* [https://www.digitalocean.com/community/tutorials/how-to-use-the-awk-language-to-manipulate-text-in-linux Purpose of using the awk utility]

* [https://man7.org/linux/man-pages/man1/sed.1p.html sed]

* [https://man7.org/linux/man-pages/man1/awk.1p.html awk]