Quote from: TheOldHat on September 04, 2017, 08:11:30 PM

I am using v 2.7.9 because it's the version that comes installed with Tails. I have no idea how to update or reinstall the latest version on an offline system. If I use internet it will defeat the purpose of a cold storage..any advice on this?

then the reason was in fact the old version.
for updating you can download the tarbal from the download webpage and then verify its signature and then install it on Tails.
https://electrum.org/#download
https://download.electrum.org/2.9.3/Electrum-2.9.3.tar.gz
https://download.electrum.org/2.9.3/Electrum-2.9.3.tar.gz.asc

Quote

Do you know of any website where I can find information about this? I find it strange with so many good coins nowadays, how there is very little information on how to install safely these wallets. Almost all videos I see are for the bigger cryptocurrencies with bitcoin being the most prominent. What would you do if you wanted to install wallets for, for ex., NEO, NEM, MIOTA,etc.

i usually ask my linux questions on reddit.
try one of these:
https://www.reddit.com/r/linuxquestions
https://www.reddit.com/r/linux4noobs
https://www.reddit.com/r/tails/

and things don't need to be specific to bitcoin, ... you are in fact trying to install/upgrade a program written in python so generally any question regarding that would also help.
and for all the other alts, their website usually has enough information such as how to install the wallet on linux.