These servers are assigned to a specific course (or courses) on a quarterly basis, and the installed software will vary, and depends on the needs of the course(s) using it in a given quarter. Check the course web page for specific instructions on how to use the server(s) if they are being used for your course.
Access to these servers is based on class enrollment lists. If you are enrolled in a course that is using one of these servers (according to Course Computing Resources), but you do not have access, contact support at cs .