name : update-function-code.rst **To update the code of a Lambda function** The following ``update-function-code`` example replaces the code of the unpublished ($LATEST) version of the ``my-function`` function with the contents of the specified zip file. :: aws lambda update-function-code \ --function-name my-function \ --zip-file fileb://my-function.zip Output:: { "FunctionName": "my-function", "LastModified": "2019-09-26T20:28:40.438+0000", "RevisionId": "e52502d4-9320-4688-9cd6-152a6ab7490d", "MemorySize": 256, "Version": "$LATEST", "Role": "arn:aws:iam::123456789012:role/service-role/my-function-role-uy3l9qyq", "Timeout": 3, "Runtime": "nodejs10.x", "TracingConfig": { "Mode": "PassThrough" }, "CodeSha256": "5tT2qgzYUHaqwR716pZ2dpkn/0J1FrzJmlKidWoaCgk=", "Description": "", "VpcConfig": { "SubnetIds": [], "VpcId": "", "SecurityGroupIds": [] }, "CodeSize": 304, "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function", "Handler": "index.handler" } For more information, see `AWS Lambda Function Configuration <https://docs.aws.amazon.com/lambda/latest/dg/resource-model.html>`__ in the *AWS Lambda Developer Guide*.