title: Issue on adding SSH key to GitHub
body: <p>I have got an issue that seems about the format of SSH key used by GitHub. I used <a href="https://superuser.com/questions/1053633/what-is-git-bash-for-windows-anyway">Git Bash</a> to generate a new SSH key:</p>
  <pre><code>$ ssh-keygen -t rsa -C &quot;youremail@youremail.com&quot;
  </code></pre>
  <p>Then, I copied the key to the SSH section in settings of my GitHub account page. However, it came with the issue notice as follows:</p>
  <pre><code>Key is invalid. It must begin with 'ssh-ed25519', 'ssh-rsa', 'ssh-dss', 'ecdsa-sha2-nistp256', 'ecdsa-sha2-nistp384', or 'ecdsa-sha2-nistp521'. Check that you're copying the public half of the key
  </code></pre>
  <p>Following that, I edited my SSH key starting with ssh-rsa and my email address at the end. However, the issue is still there.</p>
  <p>What is the solution to this?　</p>