title: Error: Failed to synchronize cache for repo 'updates'
body: <p>I am using Fedora 25. I'm trying to install gcc on fedora25  using the <code>sudo dnf install gcc</code> command. It is always showing:</p>
  
  <blockquote>
    <p>Error: Failed to synchronize cache for repo 'updates'</p>
  </blockquote>
  
  <p>I am also getting the same error when I try to install other packages. What am I doing wrong?</p>