As announced in our August 10 notification, a major transition of the operating system for Pleiades, Electra and Aitken nodes from SUSE Linux Enterprise Server (SLES) to the Red Hat Enterprise Linux (RHEL)-based Tri-Lab Operating System Stack (TOSS) is in progress.

Testing of the TOSS system image is now open to all users. We encourage you to start testing right away in order to help resolve migration issues before the SLES 12 and SLES 15 system images are turned off in late December 2021.

For information on how to get started—in particular, the use of the testing_free queue—see the following HECC Knowledge Base article: Testing Period for TOSS Operating System Migration

Please send email to support@nas.nasa.gov if you need assistance or find any problems.