First lets be very clear: I know very little about Linux, and I am working with a headless Ubuntu 18 server on an AWS lightsail instance.
I was able to get the certificates using this guide:
Now I am on to the guide found on the Ignition website:
Specifically I am on this step to create the certificate bundle:
cat $CERT_CHAIN $ROOT_CA_CERT > $CERT_BUNDLE
never mind. I now understand the using of sudo better, copying files to temp directories, and changing permissions.