Logging onto the cluster:
After you have an account (click "Using the Cluster" in menu)...
To log on type "ssh yourgatewayid@expedition.umsl.edu". If the computer you are working on has never connected to expedition, you may be asked if you want to add a RSA Fingerprint to your known hosts file. Type "yes". You will then be prompted for your password. The first time you log in this will be your "default mygateway" password. The default password format is in the form of "yyddssss", where yy=last 2 digits of birth year, dd=2 digit birth day, and ssss=last 4 digits of social security number. Change it after you log in by typing "passwd". Your new password should not be easily guessed and should be a combination of letters, numbers, and symbols. It is case sensitive, as are most things in Linux.
Log on to valhalla similarly ("ssh yourgatewayid@valhalla.umsl.edu"). Your valhalla and expedition passwords are separate entities, so you should change your password on valhalla, as well. It is initially your default gateway password.
When you log on to the cluster you will be working in a Linux environment (using a bash shell) and will be in your "home" directory. Within this directory you can add and delete files, create and delete directories (or folders), execute commands, and run scripts.
Did I mention that you should change your password the first time you log in?
Note that to log on to the cluster you must be working on a computer that is part of the UMSL network. You can get around this if you have an UMSL VPN account. Start the VPN client and then connect as normal.