Delta GPU

Direct access to the Delta login nodes is available via SSH. To log in, users must have their NCSA username, password, and complete NCSA Duo multi-factor authentication. Delta provides a total of four login nodes, labeled 01 through 04.

When setting up access, users should be prepared to address components such as their NCSA account, the Duo app for authentication, SSH configuration, and SSH key pairs. It is important to note that the use of SSH key pairs is disabled for general use. Even principal investigators are not permitted to use SSH key pairs in place of two-factor authentication. The only exception applies to principal investigators with a Gateway allocation. This does not apply to most projects, but if Gateway account key pair access is required, a support ticket must be submitted.

In addition to SSH access, Delta also provides access through other portals such as Open OnDemand, which can be used for a more user-friendly interface and additional functionality. For maintaining persistent login sessions, the tmux multiplexer is available on all Delta login nodes. This utility allows users to run multiple programs within a single terminal, detach sessions while keeping processes running, and later reattach them from a different terminal.