2023 12 grace
Grace Maintenance
December 5-7, 2023
Software Updates
- Slurm updated to 23.02.6
- NVIDIA drivers updated to 545.23.08
- Lmod updated to 8.7.32
- Apptainer updated to 1.2.4
Multifactor Authentication (MFA)
Multi-Factor authentication via Duo is now required for ssh for all users on Grace after the maintenance. For most usage, this additional step is minimally invasive and makes our clusters much more secure. However, for users who use graphical transfer tools such as Cyberduck, please see our MFA transfer documentation.
Transfer Node Host Key Change
The ssh host key for Grace's transfer node was changed during the maintenance, which will result in a "WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!" error when you attempt to login. To access the cluster again, first remove the old host keys with the following command (if accessing the cluster via command line):
ssh-keygen -R transfer-grace.ycrc.yale.edu
If you are using a GUI, such as MobaXterm, you will need to manually edit your known host file and remove the list related to Grace.
For MobaXterm, this file is located (by default) in Documents/MobaXterm/home/.ssh.
Then attempt a new login and accept the new host key.