title: Uncommon homebrew error: "Unknown command: switch"
body: <p>I am in the process of trying to restart some legacy project that demands the use of an older version of openssl.</p>
  <p>I have found good input on the issue <a href="https://stackoverflow.com/a/61086871/921573">here</a>, which worked on one of my machines but not the other, which gives me the following error:</p>
  <pre><code>$  brew switch openssl 1.0.2t
  Error: Unknown command: switch
  </code></pre>
  <p>The error does not seem to be very common, nothing helpful is showing up on a google/stackoverflow search.</p>
  <p>What I have tried so far:</p>
  <ul>
  <li>resolved all warnings shown by <code>brew doctor</code></li>
  <li>run <code>brew update &amp;&amp; brew upgrade</code></li>
  <li>updated Xcode Command Line Tools</li>
  <li>reinstalled openssl</li>
  </ul>
  <p>What can I do to fix this?</p>