I just got a GPG signature error while installing 1.2.0-rc11, fine, was planning on simply restarting add system image https://downloads.vyos.io/testing/1.2.0-rc11/vyos-1.2.0-rc11-amd64.iso to see if that would help.
marlinc@r1:~$ add system image https://downloads.vyos.io/testing/1.2.0-rc11/vyos-1.2.0-rc11-amd64.iso Trying to fetch ISO file from https://downloads.vyos.io/testing/1.2.0-rc11/vyos-1.2.0-rc11-amd64.iso % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 352M 100 352M 0 0 1273k 0 0:04:43 0:04:43 --:--:-- 3381k ISO download succeeded. Checking for digital signature file... % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 836 100 836 0 0 2123 0 --:--:-- --:--:-- --:--:-- 2121 Found it. Checking digital signature... gpg: directory `/root/.gnupg' created gpg: new configuration file `/root/.gnupg/gpg.conf' created gpg: WARNING: options in `/root/.gnupg/gpg.conf' are not yet active during this run gpg: keyring `/root/.gnupg/pubring.gpg' created gpg: assuming signed data in `/var/tmp/install-image.11577/vyos-1.2.0-rc11-amd64.iso' gpg: Signature made Mon 17 Dec 2018 10:47:55 PM UTC using RSA key ID A0FE6D7E gpg: Can't check signature: public key not found Signature check FAILED. Do you want to continue anyway? (yes/no) [no]
As you can see the default action is no, so I simply pressed enter, expecting to be dropped to the shell.
Instead the install continues:
OK. Proceeding with installation anyway. Checking MD5 checksums of files on the ISO image...OK. Done! What would you like to name this image? [1.2.0-rc11]: ^C ERROR: Signal received. Exiting... Done