on the page in the section troubleshot this llink is broken https://yamlvalidator.com/
VyOS cloud-init — VyOS 1.3.x (equuleus) documentation
For more information on the NoCloud data source, visit its page in the cloud-init documentation.
I want to do this at self but the forking workflow is a little bit oversized for change a dead link.
Also the example is wrong
set system ntp server replace it with set service ntp server xxxx