Add this config line to your Fedora CoreOS Ignition config in order to enable SSH password authentication on your install.
storage: files: - path: /etc/ssh/sshd_config.d/20-enable-passwords.conf mode: 0644 contents: inline: | PasswordAuthentication yes
By default, Fedora CoreOS will only allow pubkey authentication and disable password authentication. This Ignition config will set PasswordAuthentication yes
as a config option for the SSH daemon.
Original source: The Fedore CoreOS authentication guide.