There is a command group 'az_iot_dps_linked hub'. This group of commands could 'manage linked iot hubs in an azure iot hub device provisioning service instance'. The group of commands has global parameter '--debug' which means 'Increase logging verbosity to show all debug logs.'. The group of commands has global parameter '--help -h' which means 'Show this help message and exit.'. The group of commands has global parameter '--only-show-errors' which means 'Only show errors, suppressing warnings.'. The group of commands has global parameter '--output -o' which means 'Output format.'. The group of commands has global parameter '--query' which means 'JMESPath query string. See <a href="http://jmespath.org/">http://jmespath.org/</a> for more information and examples.'. The group of commands has global parameter '--subscription' which means 'Name or ID of subscription. You can configure the default subscription using `az account set -s NAME_OR_ID`.'. The group of commands has global parameter '--verbose' which means 'Increase logging verbosity. Use --debug for full debug logs.'. This group contains a child command 'az_iot_dps_linked hub_update'.The syntax is: az iot dps linked-hub update --dps-name
                             --linked-hub
                             [--allocation-weight]
                             [--apply-allocation-policy {false, true}]
                             [--no-wait]
                             [--resource-group]. The 1th example of the child command would be to use it to 'update linked iot hub  mylinkedhub azure devices net  in an azure iot hub device provisioning service', the syntax is: az iot dps linked-hub update --dps-name MyDps --resource-group MyResourceGroup --linked-hub MyLinkedHub.azure-devices.net --allocation-weight 10 --apply-allocation-policy True. The parameter '--dps-name' is required. It is used to iot hub device provisioning service name.. The parameter '--linked-hub' is required. It is used to host name of linked iot hub.. The parameter '--allocation-weight' is optional. allocation weight of the iot hub.. The parameter '--apply-allocation-policy' is optional. a boolean indicating whether to apply allocation policy to the iot hub.. The parameter '--no-wait' is optional. do not wait for the long-running operation to finish.. The parameter '--resource-group -g' is optional. name of resource group. you can configure the default group using `az configure --defaults group=<name>`.. 