title: What is Gitlab's instance domain?
body: <p>I am trying to test to see if my SSH key was added correctly by following the instructions which are found halfway down the page <a href="https://gitlab.com/help/ssh/README#testing-that-everything-is-set-up-correctly" rel="noreferrer">here</a>. </p>
  
  <blockquote>
    <p>To test whether your SSH key was added correctly, run the following
    command in your terminal (replacing gitlab.com with your GitLab's
    instance domain):</p>
  </blockquote>
  
  <pre><code>ssh -T git@gitlab.com
  </code></pre>
  
  <p>However, I have no idea what my "Gitlab's instance domain" is referring to. I have searched other online but I cannot find anything relevant.</p>