In order to make a particular Azure subscription as a default subscription, type:

az account set --subscription "yourAzuresubscriptionID"

In order to set a default Azure resource group, type:

az configure --defaults group="yourresourcegroup"

In order to create a new Azure resource group, remember you’ll also have to mention a location.

New-AzResourceGroup -Name yourresourcegroupname -Location westeurope

In order to view all SKUs that contain Standard_D2s in their name, for example, type:

az vm list-skus -o table --query "[?contains(name,'Standard_D2s')].name"

There are times when you need to know what are all the SKUs available in the Azure portal. In order to achieve that, use:

az vm list-skus