Hello,
The Scientific Linux distribution servers will be unavailable for
about 5 hours at May 20 2020 03:00 CDT (Chicago).
Downloads, yum operations, and mirror syncs will fail against the
following hosts:
* rsync.scientificlinux.org
* ftp.scientificlinux.org
* ftp1.scientificlinux.org
* ftp2.scientificlinux.org
For your local time you can run date -d '2020-05-19 03:00 CDT'
Thank you for your patience while we perform this maintenance.
SL Team