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**To update a pipeline** The following ``update-pipeline`` example modifies the settings of the specified pipeline. You must specify both a channel and a data store activity and, optionally, as many as 23 additional activities, in the ``pipelineActivities`` array. :: aws iotanalytics update-pipeline \ --cli-input-json file://update-pipeline.json Contents of update-pipeline.json:: { "pipelineName": "mypipeline", "pipelineActivities": [ { "channel": { "name": "myChannelActivity", "channelName": "mychannel", "next": "myMathActivity" } }, { "datastore": { "name": "myDatastoreActivity", "datastoreName": "mydatastore" } }, { "math": { "name": "myMathActivity", "math": "(((temp - 32) * 5.0) / 9.0) + 273.15", "attribute": "tempK", "next": "myDatastoreActivity" } } ] } This command produces no output. For more information, see `UpdatePipeline <https://docs.aws.amazon.com/iotanalytics/latest/APIReference/API_UpdatePipeline.html>`__ in the *AWS IoT Analytics API Reference*.