Thank you to all for all of the postings. The link below is the reason why I created this new topic:

https://itsfoss.com/ppa-guide/

Abhishek Prakash wrote this tutorial and according to the author PPA stands for "Personal Package Archive". Additionally, the author in his section titled, "Why PPA? Why not DEB packages?" writes the following:

"If you install a software using a DEB package, there is no guarantee that the installed software will be updated to a newer version when you run sudo apt update && sudo apt upgrade."

I do not claim to be an Ubuntu expert, however after reading that I couldn't help wondering if installing Bitcoin Core and Armory using PPA related terminal commands instead of using the traditional DEB install method was the smarter way to go. I may be wrong but the way I understand is using the PPA install method makes it easier to update your Bitcoin Core and Armory apps in the future.

Colton advises I don't do any of that and just go through the gpg --verify SHA256SUM.asc command process and then install the apps. I'm still trying to figure out that verification process because as I said I am not an Ubuntu expert.

Nevertheless, I was just seeking clarification on this Ubuntu software installation matter because I'm not clear if using the PPA method is supported by Bitcoin Core and Armory.  Any posts that can clarify this for me will be greatly appreciated.  Thanks in advance.