> ## Documentation Index
> Fetch the complete documentation index at: https://dragonwingdocs.qualcomm.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Common Yocto tasks

This document describes how to perform common Yocto tasks using the `kas` tool.

## Modify a recipe

Use `devtool` to modify a recipe

```bash theme={null}
kas shell -c "devtool modify <recipe>" <config.yml>
```

Make your changes, then rebuild the recipe

```bash theme={null}
kas shell -c "bitbake <recipe>" <config.yml>
```

## Generate an SDK

To generate an SDK from the current build configuration

```bash theme={null}
kas shell -c "bitbake -c do_populate_sdk <image>" <config.yml>
```

When the SDK generation is complete, you can see the images in the
`build/tmp/deploy/sdk` directory.

## Cleanup build artifacts

* Clean build artifacts for a specific recipe
  ```bash theme={null}
  kas shell -c "bitbake -fc do_cleansstate <recipe>" <config.yml>
  ```

* Rebuild the recipe after cleanup
  ```bash theme={null}
  kas shell -c "bitbake <recipe>" <config.yml>
  ```