On Monday, December 20, at 8:00 a.m. (Pacific Time), the default operating system for most NAS systems changed from SUSE Linux Enterprise Server (SLES) to the Red Hat Enterprise Linux-based Tri-Lab Operating System Stack (TOSS 3).

For important changes that may affect your workflow, please see the following article in the HECC Knowledge Base:

Migration to the TOSS Operating System

Please note that although you can still use SLES alternative operating environments (:aoe=sles12 or :aoe=sles15) to run your jobs, these images will not be available much longer. Therefore, we strongly encourage you to migrate off SLES operating systems.

If you have any questions or need help with this process, please contact us at (800) 331-8737, (650) 604-4444, or support@nas.nasa.gov.