CS21 Lab 0: UNIX and the editor (atom)
Due Saturday, September 7, before midnight
The goals for this lab assignment are:
learn about the class
gain some experience with unix commands
learn the basics of the
learn how to run our
practice using piazza
Work through the following sections and ask if you have questions!
1. Read the class web pages
Start by reading through all of the class web page!
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.
2. Read some useful CS web pages
3. Try running
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
4. Learn some UNIX
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:
lslist out files
pwdprint working directory (where you are)
passwdchange your CS password
lessshow contents of file (one page at a time)
catshow contents of file (all at once)
mvmove/rename a file
rmremove a file
cpcopy a file
sshsecure shell (how to connect to the CS machines)
5. Learn the text editor (atom)
Beginning this 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 use the atom editor.
To practice with atom, open up the
fixme.txt file in your
cs21/labs/00 directory and fix at least 5 errors in that file.
$ cd cs21/labs/00 $ atom fixme.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.
6. Edit the
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.
8. Post to Piazza
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/fall2019/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".
9. Answer the Questionnaire
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
10. (OPTIONAL) Make your own website
11. Logging out
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.
12. Come to Office Hours!
As part of your Lab 0 grade, each student must visit the office of their lecture professor. If you can come during our official office hours, that is ideal, but you are also welcome to stop by any time we are around. You do not have to have a specific question, you can just drop by to introduce yourself and learn where our offices are. We will have sign in sheets to check you off.
Section 1 (Andrew Danner): 247
Section 2 (Jeff Knerr): 238A
Section 3 (Kevin Webb): 255
Turning in your labs….
Remember 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.