To retrieve a list of versions of a function

The following list-versions-by-function example displays the list of versions for the my-function Lambda function.

aws lambda list-versions-by-function \
    --function-name my-function

Output:

{
    "Versions": [
        {
            "TracingConfig": {
                "Mode": "PassThrough"
            },
            "Version": "$LATEST",
            "CodeSha256": "sU0cJ2/hOZevwV/lTxCuQqK3gDZP3i8gUoqUUVRmY6E=",
            "FunctionName": "my-function",
            "VpcConfig": {
                "SubnetIds": [],
                "VpcId": "",
                "SecurityGroupIds": []
            },
            "MemorySize": 256,
            "RevisionId": "93017fc9-59cb-41dc-901b-4845ce4bf668",
            "CodeSize": 266,
            "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function:$LATEST",
            "Handler": "index.handler",
            "Role": "arn:aws:iam::123456789012:role/service-role/helloWorldPython-role-uy3l9qyq",
            "Timeout": 3,
            "LastModified": "2019-10-01T16:47:28.490+0000",
            "Runtime": "nodejs10.x",
            "Description": ""
        },
        {
            "TracingConfig": {
                "Mode": "PassThrough"
            },
            "Version": "1",
            "CodeSha256": "5tT2qgzYUHoqwR616pZ2dpkn/0J1FrzJmlKidWaaCgk=",
            "FunctionName": "my-function",
            "VpcConfig": {
                "SubnetIds": [],
                "VpcId": "",
                "SecurityGroupIds": []
            },
            "MemorySize": 256,
            "RevisionId": "949c8914-012e-4795-998c-e467121951b1",
            "CodeSize": 304,
            "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function:1",
            "Handler": "index.handler",
            "Role": "arn:aws:iam::123456789012:role/service-role/helloWorldPython-role-uy3l9qyq",
            "Timeout": 3,
            "LastModified": "2019-09-26T20:28:40.438+0000",
            "Runtime": "nodejs10.x",
            "Description": "new version"
        },
        {
            "TracingConfig": {
                "Mode": "PassThrough"
            },
            "Version": "2",
            "CodeSha256": "sU0cJ2/hOZevwV/lTxCuQqK3gDZP3i8gUoqUUVRmY6E=",
            "FunctionName": "my-function",
            "VpcConfig": {
                "SubnetIds": [],
                "VpcId": "",
                "SecurityGroupIds": []
            },
            "MemorySize": 256,
            "RevisionId": "cd669f21-0f3d-4e1c-9566-948837f2e2ea",
            "CodeSize": 266,
            "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function:2",
            "Handler": "index.handler",
            "Role": "arn:aws:iam::123456789012:role/service-role/helloWorldPython-role-uy3l9qyq",
            "Timeout": 3,
            "LastModified": "2019-10-01T16:47:28.490+0000",
            "Runtime": "nodejs10.x",
            "Description": "newer version"
        }
    ]
}

For more information, see Configuring AWS Lambda Function Aliases in the AWS Lambda Developer Guide.