[Yandex Cloud documentation](../../../../index.md) > [Yandex IoT Core](../../../index.md) > [Step-by-step guides](../../index.md) > Managing devices > Managing topic aliases > Creating an alias

# Creating an alias in Yandex IoT Core

{% note warning %}

Yandex IoT Core is no longer available to new users. 

Current users can create resources until November 1, 2026. Afterwards, the service will go read-only and cease to operate on December 1, 2026. For more information on the timing and procedure, see [Service shutdown](../../../sunset.md).

{% endnote %}

Aliases are linked to specific devices. To create an alias, you need to [find the device ID or name](../device-list.md).

{% note info %}

You can only use the `$me` [system alias](../../../concepts/topic/usage.md#mealias) for the `$monitoring/<device_ID>/json` topic.

{% endnote %}

{% list tabs group=instructions %}

- Management console {#console}

   To create an alias:

   1. In the [management console](https://console.yandex.cloud), select a folder where you wish to create an alias.
   1. Navigate to **IoT Core**.
   1. Select the required registry from the list.
   1. On the left side of the window, select the **Devices** section.
   1. Click ![image](../../../../_assets/console-icons/ellipsis.svg) to the right of the device name and select **Edit** from the drop-down list.
   1. Add an alias:
      1. Click **Add alias**.
      1. Fill out the fields: enter an alias, e.g., `events`, and the topic type after `$devices/<device_ID>`, e.g., `events`.<br/>You will be able to use the `events` alias instead of the `$devices/<device_ID>/events` topic.
      1. Repeat these steps for each alias you add.
   1. Click **Save**.

- CLI {#cli}
    
    If you do not have the Yandex Cloud CLI yet, [install and initialize it](../../../../cli/quickstart.md#install).
    
    The folder used by default is the one specified when [creating](../../../../cli/operations/profile/profile-create.md) the CLI profile. To change the default folder, use the `yc config set folder-id <folder_ID>` command. You can also specify a different folder for any command using `--folder-name` or `--folder-id`. If you access a resource by its name, the search will be limited to the default folder. If you access a resource by its ID, the search will be global, i.e., through all folders based on access permissions.
    
    Create an alias: 
    
    ```bash
    yc iot device add-topic-aliases arenak5ciqss********
      --topic-aliases commands='$devices/arenak5ciqss********/commands'
    ```

	  Result:
	  
    ```bash
    id: arenak5ciqss********
    registry_id: arenou2oj4ct********
    created_at: "2019-09-16T12:32:48.911Z"
    name: second
    topic_aliases:
      commands: $devices/arenak5ciqss********/commands
    ``` 

    You can also add an alias when [creating a device](../device-create.md). To do this, instead of a unique ID, specify the `{id}` in the device topic, since the unique ID is not known yet:
    
    ```bash
    yc iot device create
      --registry-name <registry_name>
      --name <device_name>
      --topic-aliases <alias_name>='$devices/{id}/<events,_state,_commands_or_config>'
    ```

- Terraform {#tf}

  With [Terraform](https://www.terraform.io/), you can quickly create a cloud infrastructure in Yandex Cloud and manage it using configuration files. These files store the infrastructure description written in HashiCorp Configuration Language (HCL). If you change the configuration files, Terraform automatically detects which part of your configuration is already deployed, and what should be added or removed.
  
  Terraform is distributed under the [Business Source License](https://github.com/hashicorp/terraform/blob/main/LICENSE). The [Yandex Cloud provider for Terraform](https://github.com/yandex-cloud/terraform-provider-yandex) is distributed under the [MPL-2.0](https://www.mozilla.org/en-US/MPL/2.0/) license.
  
  For more information about the provider resources, see the guides on the [Terraform](https://www.terraform.io/docs/providers/yandex/index.html) website or [its mirror](../../../../terraform/index.md).

  If you do not have Terraform yet, [install it and configure the Yandex Cloud provider](../../../../tutorials/infrastructure-management/terraform-quickstart.md#install-terraform).
  
  
  To manage infrastructure using Terraform under a service account or user accounts (a Yandex account, a federated account, or a local user), [authenticate](../../../../terraform/authentication.md) using the appropriate method.

  To add an alias to a device created usingTerraform:

  1. In the configuration file, describe the resources you want to create:

     * `yandex_iot_core_device`: Device properties:
       * `registry_id`: [ID of the registry](../../registry/registry-list.md#registry-list) where the device was created.
       * `name`: [Device name](../device-list.md#device-list).
       * `description`: Device description.
       * `aliases`: Topic aliases.

      Here is an example of the resource structure in the configuration file:

      ```hcl
      resource "yandex_iot_core_device" "my_device" {
        registry_id = "<registry_ID>"
        name        = "<device_name>"
        description = "test device for terraform provider documentation"

        aliases = {
          "some-alias1/subtopic" = "$devices/{id}/events/somesubtopic",
          "some-alias2/subtopic" = "$devices/{id}/events/aaa/bbb",
        }
      ...
      }
      ```

      For more on the properties of the `yandex_iot_core_device` resource, see [this provider guide](../../../../terraform/resources/iot_core_device.md).
  1. In the command line, change to the folder where you edited the configuration file.
  1. Make sure the configuration file is correct using this command:

      ```bash
      terraform validate
      ```

      If the configuration is valid, you will get this message:
     
      ```bash
      Success! The configuration is valid.
      ```

  1. Run this command:

      ```bash
      terraform plan
      ```

      You will see a list of resources and their properties. No changes will be made at this step. Terraform will show any errors in the configuration.
  1. Apply the configuration changes:

      ```bash
      terraform apply
      ```

  1. Confirm the changes: type `yes` into the terminal and press **Enter**.

      You can verify device aliases in the [management console](https://console.yandex.cloud) or using the following [CLI](../../../../cli/quickstart.md) command:

      ```bash
      yc iot device get <device_name>
      ```

- API {#api}

  To create an alias, use the [create](../../../api-ref/Device/create.md) REST API method for the [Device](../../../api-ref/Device/index.md) resource or the [DeviceService/Create](../../../api-ref/grpc/Device/create.md) gRPC API call.

{% endlist %}