az lab --help Manage Azure DevTest Labs.

addaxnasom

This command group is in preview. It may be changed/removed in a future release.

Group
    az lab : Manage Azure DevTest Labs.
        This command group is in preview. It may be changed/removed in a future release.
Subgroups:
    arm-template    : Manage Azure Resource Manager (ARM) templates in an Azure DevTest Lab.
    artifact        : Manage DevTest Labs artifacts.
    artifact-source : Manage DevTest Lab artifact sources.
    custom-image    : Manage custom images of a DevTest Lab.
    environment     : Manage environments for an Azure DevTest Lab.
    formula         : Manage formulas for an Azure DevTest Lab.
    gallery-image   : List Azure Marketplace images allowed for a DevTest Lab.
    secret          : Manage secrets of an Azure DevTest Lab.
    vm              : Manage VMs in an Azure DevTest Lab.
    vnet            : Manage virtual networks of an Azure DevTest Lab.

Commands:
    delete          : Delete lab.
    get             : Get lab.