Streeky - do a bit of research on "apt" an its sources list.

What that is you're trying to do is install some software. Debian and its children use apt as a package manager, which means it's a program that can be used to download and install pre-compiled software and other useful resources. It does so easily by maintaining a list of sources, which is to say servers that keep info on those packages, where to find them and how to download and install them. If a package is not found, it could be your sources list is incomplete or you could be using an old enough version that the default sources list is no longer accurate. Or for some reason you're not connecting to the internet properly.

It's not a 2Pac problem so much as an OS problem.