# Create a lifecycle configuration to install Code Editor extensions
<a name="code-editor-use-lifecycle-configurations-extensions"></a>

This section shows how to create a lifecycle configuration to install extensions from the [Open VSX Registry](https://open-vsx.org/) in your Code Editor environment.

1. From your local machine, create a file named `my-script.sh` with the following content:

   ```
   #!/bin/bash
   set -eux
   ```

1. Within the script, install the [Open VSX Registry](https://open-vsx.org/) extension of your choice:

   ```
   sagemaker-code-editor --install-extension AmazonEMR.emr-tools --extensions-dir /opt/amazon/sagemaker/sagemaker-code-editor-server-data/extensions
   ```

   You can retrieve the extension name from the URL of the extension in the [Open VSX Registry](https://open-vsx.org/). The extension name to use in the `sagemaker-code-editor` command should contain all text that follows `https://open-vsx.org/extension/` in the URL. Replace all instances of a slash (`/`) with a period (`.`). For example, `AmazonEMR/emr-tools` should be `AmazonEMR.emr-tools`.  
![\[The Amazon EMR extension page in the Open VSX Registry.\]](http://docs.aws.amazon.com/sagemaker/latest/dg/images/code-editor/code-editor-emr-extension.png)

1. After finalizing your script, create and attach your lifecycle configuration. For more information, see [Create and attach lifecycle configurations in Studio](code-editor-use-lifecycle-configurations-studio-create.md).

1. Create your Code Editor application with the lifecycle configuration attached:

   ```
   aws sagemaker create-app \
   --domain-id domain-id \
   --space-name space-name \
   --app-type CodeEditor \
   --app-name default \
   --resource-spec "SageMakerImageArn=arn:aws:sagemaker:region:image-account-id:image/sagemaker-distribution-cpu,LifecycleConfigArn=arn:aws:sagemaker:region:user-account-id:studio-lifecycle-config/my-code-editor-lcc,InstanceType=ml.t3.large"
   ```

   For more information about available Code Editor image ARNs, see [Code Editor application instances and images](code-editor-use-instances.md). For more information about connections and extensions, see [Code Editor Connections and Extensions](code-editor-use-connections-and-extensions.md).