Passwordless SSH

You can setup an SSH key to access the cluster front ends and nodes within the CCI without being prompted for a password. This is required if you are running parallel programs with using mpirun and some other frameworks that use SSH behind the scenes.

To setup a passwordless SSH key, perform the steps below once from any node. Make sure to accept the default option for storing the key and do not set a passphrase.

  1. Connect to one of the CCI landing pads via SSH
  2. ssh-keygen -t rsa
  3. cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

You can now access a other nodes, such as front-end nodes, without prompted for a password, ex:

ssh dcsfen01

Last update: May 14, 2020