Unable to install drivers from two days to demo

I am currently running a GTX 1070 and trying to follow the two days to a demo series shown here:https://github.com/dusty-nv/jetson-inference#system-setup

I am at the section that talks about installing the NGC registry and drivers yet when I run the code in a terminal it says “Failed to fetch [a link to some package] 404 Not Found [IP: 80]”

Any help would be gladly appreciated!

You should identify the exact line of code that is giving that error.