title: Does .net core sdk 2.1.4 need a project to run ef core scaffold
body: <p>I have downloaded the .net core sdk 2.1.4. When I run dotnet ef -h I get:</p>
  
  <p>No executable found matching command "dotnet-ef"</p>
  
  <p>What do I need to do to get ef core commands as part of dotnet command line.</p>
  
  <p>Sorry I am a newbie at this. Also, I want to run ef core scaffold from command line without a project is that possible? </p>