When I tried to upgrade a Fedora 26 Server earlier today, I got this error message after downloading packages:
warning: /var/cache/dnf/forensics-5e8452ee3a114fbe/packages/protobuf-c-1.3.0-1.fc26.x86_64.rpm: Header V4 RSA/SHA1 Signature, key ID 87e360b8: NOKEY
Importing GPG key 0x87E360B8:
Userid : "CERT Forensics Operations and Investivations Team <[email protected]>"
Fingerprint: 26A0 829D 5C01 FC51 C304 9037 E97F 3E0A 87E3 60B8
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-cert-forensics-2018-04-07
Is this ok [y/N]: n
Didn't install any keys
The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing 'dnf clean packages'.
Error: GPG check FAILED
So I aborted the upgrade, and I tried to
dnf clean packages and redownload, but I still got the same error.
It seems that the
protobuf packaged does not have a valid signature so
dnf cannot continue, is that correct?