I am getting this SMG from cloud-init; with a clean installation of Ubuntu 18.04.1
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The solution that worked with me, as shown here, just create an empty file, type :
sudo touch /etc/cloud/cloud-init.disabled
You can configure getty@.service to wait until cloud-init.target has finished. Same concept as this answer, but waiting for network.target didn't work for me with the cloud-init messages.
mkdir /etc/systemd/system/getty@.service.d/ nano /etc/systemd/system/getty@.service.d/cloud-init_wait.conf #anything ending in .conf
The rest is identical. Create a
.conf file inside this directory, add the contents
to it and reboot. That should do the trick.