This assumes you have already configured the aws command line tool. If not, check out my article on Getting Started with the AWS CLI.

The aws lambda list-functions command can be used to list the Lambda Functions you have created.

aws lambda list-functions

Something like this should be returned.

{
    "Functions": [
        {
            "TracingConfig": {
                "Mode": "PassThrough"
            },
            "Version": "$LATEST",
            "CodeSha256": "/ur2jHd199ldQbP+Y20sw3kIHhaWwnPY6CQvSwZ6Kco=",
            "FunctionName": "myfunction",
            "MemorySize": 128,
            "RevisionId": "741c094a-cff2-4cdb-a5b6-110a900e1a43",
            "CodeSize": 529507,
            "FunctionArn": "arn:aws:lambda:us-east-1:123456789012:function:myfunction",
            "Handler": "app.lambda_handler",
            "Role": "arn:aws:iam::123456789012:role/myfunction",
            "Timeout": 3,
            "LastModified": "2023-11-16T02:52:04.978+0000",
            "Runtime": "python3.9",
            "Description": ""
        }
    ]
}

You can:

• use the aws lambda update-function-configuration command to update your Lambda Function configuration (this article)
• use the aws lambda update-function-code commadn to update your Lambda Function code

In this example, the aws lambda update-function-configuration command can be used to increase the timeout from 3 seconds to 6 seconds.

aws lambda update-function-configuration --function-name myfunction --timeout 6