# UpdateSharedFile

Updates a file in the shared file directory for the Controller server.

## Required Parameters

The following action parameters are required.

Parameter | Description
--- | ---
FileName | The name of the file to update.
Operation | The type of operation to perform on the file.

You must set at least one of the following parameters.

Parameter | Description
--- | ---
FileData | Data encoded as `multipart/form-data` that is sent as part of the request, containing the new file to use. This parameter is required if you set `Operation` to `create` or `update`.
OldCheckSum | The checksum of the old configuration file. This parameter is required if you set `Operation` to `update` or `delete`.

## Comments

You can also submit this action from Coordinator by specifying the `ControllerUUID` parameter. For more information, refer to the Coordinator Reference.

## See Also

- SharedFilePath (configuration parameter)

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