Ssh onto one of the log-in nodes; for example, ssh email@example.com will ssh you onto log-in node nexuscbcb00.
Type your password followed by enter.
Type 1 followed by enter to use Duo 2FA; then approve the request through the DUO app on your mobile device.
Making the log-on process easier
The following instructions make it so you don't have to enter your password each time you are ssh-ing or scp-ing.
Set-up an alias for the ssh command above in your bash profile, so you don't have to type the full command each time you ssh.
Set-up the UMIACS VPN on your computer by following the instructions here: https://wiki.umiacs.umd.edu/umiacs/index.php/Network/VPN so you don't have to use 2FA each time you ssh. (Note that the VPN is also useful for accessing journal articles behind paywalls when you are at home.)
Set-up an RSA key for the CBCB cluster by following the instructions here: https://kb.iu.edu/d/aews so you don't have to type your password each time you ssh.
If you are using the VPN, you now should be able to ssh onto the CBCB cluster just by typing the ssh command or alias. If this doesn't work, email staff at umiacs dot umd dot edu for assistance.