~$ az vm image list
You are viewing an offline list of images, use --all to retrieve an 
up-to-date list
[
  {
    "offer": "CentOS",
    "publisher": "OpenLogic",
    "sku": "7.5",
    "urn": "OpenLogic:CentOS:7.5:latest",
    "urnAlias": "CentOS",
    "version": "latest"
  },
  {
    "offer": "CoreOS",
    "publisher": "CoreOS",
    "sku": "Stable",
    "urn": "CoreOS:CoreOS:Stable:latest",
    "urnAlias": "CoreOS",
    "version": "latest"
  },
