Update: In case anyone finds this later, I just ran across this page of someone else doing EXACTLY what I wanted to do, for exactly the same reason: https://bl

Update: In case anyone finds this later, I just ran across this page of someone else doing EXACTLY what I wanted to do, for exactly the same reason: https://blog.thelifeofkenneth.com/2018/01/off-grid-raspbian-repositories.html https://blog.thelifeofkenneth.com/2018/01/off-grid-raspbian-...