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**To update a thing shadow**
The following ``update-thing-shadow`` example modifies the current state of the device shadow for the specified thing and saves it to the file ``output.txt``. ::
aws iot-data update-thing-shadow \
--thing-name MyRPi \
--payload "{"state":{"reported":{"moisture":"okay"}}}" \
"output.txt"
The command produces no output on the display, but the following shows the contents of ``output.txt``::
{
"state": {
"reported": {
"moisture": "okay"
}
},
"metadata": {
"reported": {
"moisture": {
"timestamp": 1560270036
}
}
},
"version": 2,
"timestamp": 1560270036
}
For more information, see `Device Shadow Service Data Flow <https://docs.aws.amazon.com/iot/latest/developerguide/device-shadow-data-flow.html>`__ in the *AWS IoT Developers Guide*.
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