title: rsync can't resolve the hostname
body: <p>As my network connection is slow and noisy, I want to use <code>rsync</code> to install texlive 2018. I posted a <a href="https://tex.stackexchange.com/questions/368478/how-to-cancel-and-resume-texlive-installation">question</a> on installation texlive offline in slow an d noisy network.  </p>
  
  <p>But, <code>rsync</code> is failed in my pc. What is the actual command to do this task?
  <a href="http://tug.org/texlive/acquire-mirror.html" rel="nofollow noreferrer">Downloading/mirroring the TeX Live repository</a> </p>
  
  <pre><code>  $ rsync -a --delete http://ctan.math.illinois.edu/systems/texlive/tlnet /home/alhelal/Downloads
      ssh: Could not resolve hostname http: Name or service not known
      rsync: connection unexpectedly closed (0 bytes received so far) [Receiver]
      rsync error: unexplained error (code 255) at io.c(226) [Receiver=3.1.0]
  </code></pre>