Familiarize yourself with the UNIX command line commands, and basic output.
Utilize both the sources at http://www.cs.uic.edu/~consult/how/unix.html and/or the list on our course web site at http://logos.cs.uic.edu/Examples%20And%20Notes/.
You won't need to know lpr, but you should look up pipes and redirects. One such page (pulled randomly from google) is as follows: http://www.westwind.com/reference/os-x/commandline/pipes.html.
There are many sources on Unix and the command line, so if one is confusing use another. Another example which has some screenshots that go along with it is http://www.ee.surrey.ac.uk/Teaching/Unix/.
Also, be sure you're keeping up with the reading. Chapters 1-4 are fair game for the quiz, and the material may be needed for the lab. Start getting comfortable with input and output in both C and C++ style, as we'll be using them without explanation beyond this week.