8a1ad785c25e39aa796a0a074a5c4913680daeeb
brianlee
  Thu Jun 10 11:59:40 2021 -0700
Adding a note about refreshing the CyVerse cache if you replace a file refs #27543

diff --git src/hg/htdocs/goldenPath/help/hgTrackHubHelp.html src/hg/htdocs/goldenPath/help/hgTrackHubHelp.html
index 3bab9da..64c8924 100755
--- src/hg/htdocs/goldenPath/help/hgTrackHubHelp.html
+++ src/hg/htdocs/goldenPath/help/hgTrackHubHelp.html
@@ -982,30 +982,35 @@
 <div class="text-center">
   <img height="200px" src="../../images/cyverseCreatePublicLink2.png">
 </div>
 <p>
 The hub.txt file (if not using the <a href="hgTracksHelp.html#UseOneFile"
 target="_blank">useOneFile on</a> setting) will need to point the related
 genomes.txt location, which in turn points to the trackDb.txt location
 using these full https://data.cyverse.org/... links as well.</p>
 <p>
 Please see the <a href="https://cyverse.atlassian.net/wiki/spaces/DEmanual/pages/242027070/Using+the+Discovery+Environment"
 target="_blank">Using the Discovery Environment</a> wiki page on the CyVerse wiki for more information.
 Please direct any questions about CyVerse or the Discovery Environment to their 
 <a href="https://cyverse.org/contact" target="_blank">Contact Us</a> page or &quot;Chat with
 Cyverse support&quot; staff directly via the blue question box icon on the top right of the
 Discovery Environment page.</p>
+<p>
+Note, if you need to replace files once they have been uploaded into CyVerse's DE and Public links
+have already been created you will need to force update the CyVerse cache by hitting Control-Shift-R
+in your browser to force reload the file or by sending Cache-Control: no-cache header: <code>curl
+--head --header 'Cache-Control: no-cache' https://data.cyverse.org/.../dataFile.bam</code></p>
 <!-- Galaxy stub
 <h3>Hosting Hubs on Galaxy</h3>
 <p>
 Galaxy is 
 </p>
 -->
 <h3>Hosting Hubs on Github</h3>
 <p>
 <a href="https://github.com" target="_blank">Github</a> supports byte-range access to files when they are accessed
 via the <em><b>raw.githubusercontent.com</b></em> style URLs. To obtain a raw URL to a file already 
 uploaded on Github, click on a file in your repository and click the <em>Raw</em> button:</p>
 <div class="text-center">
   <img height="275px" width="55%" src="../../images/githubRawLink.png" alt="Location of the Raw button for generating a plaintext URL to a file hosted on Github.">
 </div>
 <p>