az acr --help Manage private registries with Azure Container Registries.

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Group
    az acr : Manage private registries with Azure Container Registries.

Subgroups:
    config              : Configure policies for Azure Container Registries.
    credential          : Manage login credentials for Azure Container Registries.
    helm                : Manage helm charts for Azure Container Registries.
    network-rule        : Manage network rules for Azure Container Registries.
    pack      [Preview] : Manage Azure Container Registry Tasks that use Cloud Native
                          Buildpacks.
    replication         : Manage geo-replicated regions of Azure Container Registries.
    repository          : Manage repositories (image names) for Azure Container Registries.
    scope-map [Preview] : Manage scope access maps for Azure Container Registries.
    task                : Manage a collection of steps for building, testing and OS & Framework
                          patching container images using Azure Container Registries.
    token     [Preview] : Manage tokens for an Azure Container Registry.
    webhook             : Manage webhooks for Azure Container Registries.

Commands:
    build               : Queues a quick build, providing streaming logs for an Azure Container
                          Registry.
    check-health        : Gets health information on the environment and optionally a target
                          registry.
    check-name          : Checks if an Azure Container Registry name is valid and available for use.
    create              : Creates an Azure Container Registry.
    delete              : Deletes an Azure Container Registry.
    import              : Imports an image to an Azure Container Registry from another Container
                          Registry. Import removes the need to docker pull, docker tag, docker push.
    list                : Lists all the container registries under the current subscription.
    login               : Log in to an Azure Container Registry through the Docker CLI.
    run                 : Queues a quick run providing streamed logs for an Azure Container
                          Registry.
    show                : Get the details of an Azure Container Registry.
    show-usage          : Get the storage usage for an Azure Container Registry.
    update              : Update an Azure Container Registry.