The other issue is that the common repositories you find online are often created with configured to work with the native package management utilities for the OS they are offering software for. But they don't offer the software themselves, they are configured to query the repositories and provide packages from them. are all utilities on varying *NIX distributions that do the same thing. The issue here is the apt utility is a program that works with published directories of software packages (repositories is the usual name for me, but it can vary). While it is certainly possible to install the apt package management utilities on an Enterprise Linux system, that does not mean you will be able to do anything with it once you are done. You will likely find a LOT of what you are missing in that repo. For Red Hat Enterprise Linux, the first repo to usually add is Extra Packages For Enterprise Linux (EPEL) hosted at The Fedora Project. What you want to look into is adding different repositories. If you are having trouble finding the software you want on Red Hat, it is because your repositories don't have the packages. TL DR apt usually doesn't work out of the box with Enterprise Linux based distros and you won't find many repos that work for you anyway.

Aptget update