When you access "condor" through the "Telnet" or ssh (Secure shell) application on your local computer, then your local computer undergoes a chameleon-like transformation and loses its identity. It becomes an extension of "condor", adopting its characteristics, idiosynchrosies, and computational power. In certain cases we would like to use our local computer in its own right, enjoying our favourite local editor (rather than UNIX's ubiquitous vi editor), or, in the case of this lab, using the plotting facilities available in MATLAB on our local computer to graph our data. Thus we need the ability to transfer files between "condor" and our local computer.
This is done using the FTP (File Transfer Protocol) application. Different computers use different FTP applications, however in general to "get" a file means to "download" the file from "condor" to your local computer. To "put" a file means to "upload" that file from your local computer to "condor".
Your recitation tutor will explain to you how to use the specific FTP application on the computers in the lab in order to download the two text data files sine.data and dart.data from "condor" to your local computer. Once that has been accomplished you will use the MATLAB application to graph the data.