PermitRootLogin yes, but /root/.ssh/authorized_keys:
no-port-forwarding,no-agent-forwarding,no-X11-forwarding,command="echo 'Please login as the user \"ubuntu\" rather than the user \"root\".';echo;sleep 10" ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAACAQCrucwUwyULu0n8XCsWn... me@example.com
PermitRootLogin yes, but/root/.ssh/authorized_keys:no-port-forwarding,no-agent-forwarding,no-X11-forwarding,command="echo 'Please login as the user \"ubuntu\" rather than the user \"root\".';echo;sleep 10" ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAACAQCrucwUwyULu0n8XCsWn... me@example.com