For example, if you need to view all available virtual machine images published by Microsoft, you can use:

az vm image list --publisher Microsoft -o table

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

In order to update a current Azure disk performance SKU, from Standard_LRS to Premium_LRS, for example, type:

az disk update --name yourdiskname --resource-group yourresourcegroup --sku Premium_LRS

In order to view current disk performance SKU in Azure, type:

az disk show --resource-group yourresourcegroup --name yourdiskname --query sku