OK, setting up a production server (not live yet) and I am encountering a strange issue that I have not seen previously.
Issue:
Installed Craft on an Ubuntu 16.10 LAMP server. When all commands for installing were completed, I tested my site with its IP address to make sure everything worked and I got the following:

Then when I got to 192.168.5.254/public/index.php/admin/install -- which has worked on the two test servers I have built previously -- I get this:

An to make sure that I have tried another method of gaining access to the installer, I went here 192.168.5.254/admin which redirected to 192.168.5.254/admin/login, I get this:

Clearly Craft is working as these are not Apache 404's; however I never got the install screen at all. Just the homepage and login screen. Did I miss or mess something up during this specific install?
As usual, if you need additional information, let me know I will post it in here for visual use. Thank you very much for your assistance!