Issue in Create your app

Problem encountered on https://dotnet.microsoft.com/learn/data/spark-tutorial/create
Operating System: linux

I have followed the tutorial step by step, while running below command:
dotnet new console -f netcoreapp3.1 -o mySparkApp

I got stuck in this issue

Couldn't find an installed template that matches the input, searching online for one that does...
Error: Invalid parameter(s):
-f netcoreapp3.1
'netcoreapp3.1' is not a valid value for -f (Framework).