title: Solana hello_world problem on Windows 10/WSL2/Ubuntu 18.04
body: <p>I'm trying to follow <a href="https://github.com/solana-labs/example-helloworld" rel="nofollow noreferrer">this tutorial</a>.</p>
  <p>I'm running a WSL2 Ubuntu18.04 machine in a Windows 10 system and am stuck when running this line:</p>
  <p><code>$ solana-test-validator</code></p>
  <p>This is the output I get:</p>
  <pre><code>Ledger location: test-ledger
  Log: test-ledger/validator.log
  Unable to connect to validator: Client error: test-ledger/admin.rpc does not exist
  </code></pre>
  <p>Any clues about what can be wrong?</p>