title: Disable telemetry in `dotnet` core 3.0 cli util?
body: <p>How is it possible fully disable (or firewall) telemetry of cli util <code>dotnet</code> in linux?</p>
  
  <p>setting environment variable:</p>
  
  <pre><code>    echo "export DOTNET_CLI_TELEMETRY_OPTOUT=1"
  </code></pre>
  
  <p>helps only disable telemetry when starting <code>dotnet</code> with params:</p>
  
  <pre><code>    dotnet build
      dotnet pack
      dotnet run
  </code></pre>
  
  <p>but if for ex. call <code>dotnet</code> with params: </p>
  
  <pre><code>    dotnet new
      dotnet nuget
      ...
  </code></pre>
  
  <p>telemetry is sent anyway. (doc: <a href="https://docs.microsoft.com/en-us/dotnet/core/tools/telemetry#collected-options" rel="nofollow noreferrer">https://docs.microsoft.com/en-us/dotnet/core/tools/telemetry#collected-options</a>)</p>
  
  <p>Any ides, options? White rules for nftables/proxychains?</p>