I've tried all the (old) instructions on how to install Electrum from a live Ubuntu USB, but nothing is working for me.   I'm using Ubuntu 16.04 LTS.

The software center install doesn't work..but that's fine, the version there is pretty old. 

But the instructions from the electrum website are also not working for me.    Even after working around all the various error messages, and installying python3 etc... .still no dice.

Is there a tried and tested way of getting electrum to install on a live Ubuntu CD?  I'm hoping to install it, unplug ethernet cable, run it, and write down the 13 keywords and receive address, then send coins to the (cold) wallet, and one day make it "hot" by re-building from my 13 keywords.   Reasonable?