az group --help Manage resource groups and template deployments.

addaxnasom

Group
    az group : Manage resource groups and template deployments.

Subgroups:
    deployment : Manage Azure Resource Manager deployments.
    lock       : Manage Azure resource group locks.

Commands:
    create     : Create a new resource group.
    delete     : Delete a resource group.
    exists     : Check if a resource group exists.
    export     : Captures a resource group as a template.
    list       : List resource groups.
    show       : Gets a resource group.
    update     : Update a resource group.
    wait       : Place the CLI in a waiting state until a condition of the resource group is met.