Maybe this is overkill for your purposes, but when I was working with multiple Pandaboards in a lab that didn't allow them real internet access I used this to set up "local repos" using a laptop and external USB drive connected and home and then moved into the lab and connected to the isolated local network as necessary:
https://www.howtoforge.com/local_debian_ubuntu_mirror While the initial setup took over night, keeping it updated wasn't too bad. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/8c5b5c7c-a261-43c4-9867-3fdbea40ce54%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
