The fri cluster is running a Linux operating system so to access the cluster you must use a Secure Shell (SSH) client.

WINDOWS
There are many clients available for window but they all perform essentially the same. You may use any client you like for this class, but here are the best free clients you should try:
PuTTY
  PuTTY: SSH client
  Xming: An X Server for windows.

You will need both of these clients. Open Xming first and with Xming running, open PuTTY.

To connect in PuTTY (with Xming running), under session set the host name as fri.oden.utexas.edu
Under "connection" -> "data" set "username" to your EID. Finally, under "connection" -> "ssh" -> "x11" ensure that x11 forwarding is enabled.

MAC/Linux
These operating systems are already equipped to handle ssh communication directly from a terminal window. If you are running 10.5 - 10.8 (leopard - mountain lion) you should have an x11 window already installed. In spotlight, the small magnifying glass in the upper right, type "x11". You should see an x11 application; open this. If you are running Mavericks (10.9) and/or you do not see this application, download x11 for Mac OS X.

To log in from the x11 window simply type:
ssh -X eid@fri.oden.utexas.edu
Here "eid" is your eid.

Chromebook
To use secure shell client on chromo OS, you can follow the instructions HERE under the first two section called "Opening Crosh" and "ssh". To login the host is fri.oden.utexas.edu and the user is your eid.

An alternative to this is to download the Chrome Secure Shell App