title: git push: fatal: the remote end hung up unexpectedly Connection to github.com closed by remote host
body: <p>I'm using ssh and RSA keys to access github, but it doesn't work when I push files to the repository.</p>
  <pre><code>ykhan21@LENOVO-LEGION:~/repos/homework-1-ykhan21$ git push
  Enumerating objects: 6, done.
  Counting objects: 100% (6/6), done.
  Delta compression using up to 12 threads
  Compressing objects: 100% (4/4), done.
  Writing objects: 100% (4/4), 2.79 KiB | 2.79 MiB/s, done.
  Total 4 (delta 0), reused 0 (delta 0)
  fatal: the remote end hung up unexpectedly
  fatal: the remote end hung up unexpectedly
  Connection to github.com closed by remote host.
  </code></pre>
  <p>How can I fix this?</p>