I had the same issue with emacs-nox, but I have installed it on Windows 10 inside of WSL2 with Ubuntu 18.04.
I was able to workaround the issue with: gpg --homedir ~/.emacs.d/elpa/gnupg --keyserver hkps://keyserver.ubuntu.com:443 --receive-keys 066DAFCB81E42C40 After successfully importing the key, a package-refresh-contents worked fine. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to emacs25 in Ubuntu. https://bugs.launchpad.net/bugs/1862713 Title: Failed to verify signature archive-contents.sig Status in emacs25 package in Ubuntu: Confirmed Bug description: After freshly installing the emacs25-nox package, the very first command I ran was > M-x list-packages Which immediately produced this error. Failed to verify signature archive-contents.sig: No public key for 066DAFCB81E42C40 created at 2020-02-10T16:05:02-0600 using RSA Command output: gpg: Signature made Mon 10 Feb 2020 04:05:02 PM CST gpg: using RSA key C433554766D3DDC64221BFAA066DAFCB81E42C40 gpg: Can't check signature: No public key I have no .emacs or .emacs.d configured - this is a 100% fresh "apt install" of emacs25-nox. I would expect Emacs packaged with Ubuntu to be bundled with a valid key! Also, none of the instructions on the internet actually work on getting this fixed! ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: emacs25-nox 25.2+1-6 ProcVersionSignature: Ubuntu 5.3.0-28.30~18.04.1-generic 5.3.13 Uname: Linux 5.3.0-28-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.9 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Mon Feb 10 20:26:51 2020 InstallationDate: Installed on 2019-12-29 (43 days ago) InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: emacs25 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/emacs25/+bug/1862713/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
