Hi again Yes, sorry for my first response, later I've been told that it wouldn't work :(
I haven't got a lenny box here, but this is what I've tried now, playing with my apt sources (without effectively installing packages): 1.- For fixing the NOPUBKEY error, you need to retrieve and import the Lenny key: gpg --keyserver pgp.mit.edu --recv-keys AED4B06F473041FA gpg --armor --export AED4B06F473041FA | sudo apt-key add - 2.- Then, I've edited /etc/apt/sources.list and added the lenny repo allowing it being not authenticated: deb http://archive.debian.org/debian/ lenny allow-insecure=yes main 3.- Then sudo apt-get --allow-unauthenticated upgrade sudo apt-get -o Acquire::Check-Valid-Until=false update the output still gives warnings but maybe they are only warnings and you can install packages? If not, I would try to get help from our user support channels (https://www.debian.org/support) in order to manually download and install the packages that you need (if they are not much of them). I will not reopen this bug, because as I said lenny is archived and it won't change, probably, and also, archive.debian.org it's not maintained by the website team currently... If you reopen the bug I would suggest to reassign to "apt" package, for the case there is an option that we both are overlooking; but IMO this is more a question for user support. Best regards -- Laura Arjona Reina https://wiki.debian.org/LauraArjona