If you are registered for Math 230, you can access MATLAB and other software packages through the web interface available at my.math. You can log in using your WSU ID and password. For doing calculations at the MATLAB command prompt, this web interface is quite adequate. If you want to write detailed programs/scripts in MATLAB, or access all the features of the user interface including browsable help, you could do so by logging on to the machine pingora.math.wsu.edu using the username and password given to you in class. To do so, follow these steps, assuming you are using a computer running Windows.
With a reasonably fast Internet connection, it should be fine to run Matlab this way, with windows popping up on your desktop. If the Internet connection is weak, you could still run Matlab in the command prompt (in the PuTTy window itself, rather than popping open a separate window). To do so, give the command matlab -nodisplay (note that there is no & here).
If you are using Linux, you can connect to pingora by ssh-ing from a terminal. When you do so, make sure you give the "-X" option so that Matlab or other windows would pop up on your desktop. For instance, you can give the following command in a terminal: ssh -X email@example.com.
Folks using a Mac can also ssh to pingora from a terminal, but use the "-Y" option instead of "-X" in the above command.
Once you log on to pingora, you can change your password using the command passwd. For those new to Unix/Linux, google basic unix commands.