The goals for this lab assignment are:
Work through the following sections and ask if you have questions!
Start by reading through all of the class web page!
Pay special attention to the Schedule, Academic Integrity, and How to succeed in CS21 sections!
You should get into the habit of checking the class page weekly. The class topics, lab assignments, weekly readings, and announcements will be posted to the class schedules each week.
From the CS homepage, please read these important pages:
update21 command copies any files your professors want you to have from them
cs21 directory. It's a good habit to run
update21 each time you log in.
If you haven't run it already, this will create your
Open a terminal window (click the icon) and enter the commands below after the unix prompt (the dollar sign):
$ update21 # creates cs21 directory, with labs/00 dir below $ cd cs21/labs/00 # cd into the correct directory for lab 00 $ pwd # check to see that you are in the correct directory. # if yes, it will print /home/your_username/cs21/labs/00
Read through our UsingUnix web pages and try the various unix commands. These pages are just to help you get comfortable with the unix command line (there's nothing you have to write or turn in). Make sure you understand the following commands:
ls-- list out files
cd-- change directory
pwd-- print working directory (where you are)
passwd-- change your CS password
less-- show contents of file (one page at a time)
cat-- show contents of file (all at once)
mv-- move/rename a file
rm-- remove a file
cp-- copy a file
ssh-- secure shell (how to connect to the CS machines)
Beginning this Thursday or Friday we will start using the text editor in class, so you need to at least know the basics.
All professors teaching this course will utilize atom.
To practice with atom, open up the
fixme-gb.txt file in your
cs21/labs/00 directory and fix the 5 errors in that file.
$ cd cs21/labs/00 $ atom fixme-gb.txt
Here's a list of keyboard shortcuts to help you learn the atom text editor. Make sure you at least know how to open a new file, add text, and then save it to the correct directory.
For more practice with editing, and so we can learn a little
about you, edit the
bio.txt file in your
$ atom bio.txt
Note: this file should have a few simple questions in it for you to answer.
If you don't see those questions, make sure you are in the
directory (i.e., run the
pwd command), and/or run the
command to make sure you get the initial file from your professor.
Once you are satisfied with your
bio.txt file, hand it in by typing
handin21 at the unix prompt.
You may run
handin21 as many times as you like. Each time you
run it, new versions of your files will be submitted (i.e., any files you've
made changes to). Running
after you finish a program, after any major changes are made, and
at the end of the day (before you log out) is a good habit to get into.
handin21, will grab all files from your
Each week, make sure you create your lab programs and files in the
This semester we'll be using Piazza, an online QandA forum for class discussion, help with labs, clarifications, and announcements that pertain to all sections of cs21. Our Piazza page is https://piazza.com/swarthmore/fall2017/cs21. You should have received an email invitation to join cs21 on Piazza - if not let us know.
For this first lab, just to get comfortable using Piazza, choose at least
one part of your
bio.txt file above to
post on Piazza (non-anonymously). You can include where you are from,
something else you are doing at Swarthmore, your entire bio, or whatever you
prefer. Add your post to
as a "new followup discussion".
Each lab will have a short questionnaire at the end. Please edit
QUESTIONS-00.txt file in your
and answer the questions in that file.
Once you're done with that, run
When you are all done working in the lab, you should log out of the computer you are using. First quit any applications you are running, like the browser and the Terminal. Then click on the logout icon and choose "log out".
If you plan to leave the lab for just a few minutes, and then come right back to work, you do not need to log out. It is,however, a good idea to lock your machine while you are gone. You can lock your screen by clicking on the lock icon.
Don't forget to run
handin21 to turn in your lab files!
You may run
handin21 as many times as you want. Each time it will
turn in any new work. We recommend running
you complete each program or after you complete significant
work on any one program.