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File: //lib/python2.7/site-packages/awscli/examples/greengrass/update-core-definition.rst
**To update a core definition**

The following ``update-core-definition`` example changes the name of the specified core definition. You can update only the ``name`` property of a core definition. ::

    aws greengrass update-core-definition \
        --core-definition-id "582efe12-b05a-409e-9a24-a2ba1bcc4a12" \
        --name "MyCoreDevices"

This command produces no output.

For more information, see `Configure the AWS IoT Greengrass Core <https://docs.aws.amazon.com/greengrass/latest/developerguide/gg-core.html>`__ in the *AWS IoT Greengrass Developer Guide*.
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