Hello, The Scientific Linux distribution servers will be unavailable for about 2 hours at November 29 2017 14:00 CST (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 '2017-11-29 14:00 CST' Thank you for your patience while we perform this maintenance. Pat Riehecky