Sonoma State University

Department of Computer Science

CS-210: Introduction to Unix

Fall 2026

Exercise 2

Objective:

  • In this exercise, you will create an organizational directory structure in your home directory on blue.cs.sonoma.edu to store all of your future assignments for CS-210. Next, you will traverse the entire directory structure to practice navigating the filesystem.

Instructions:

  1. secure shell into blue.cs.sonoma.edu (ssh YOUR_USERNAME@blue.cs.sonoma.edu)
  2. Inside your home directory on blue.cs.sonoma.edu, please create the following directories:
    • cs210_exercises
    • cs210_exercises/cs210_exercise_2
    • cs210_exercises/cs210_exercise_3
    • cs210_exercises/cs210_exercise_4
    • cs210_exercises/cs210_exercise_5
    • cs210_exercises/cs210_exercise_6
    • cs210_exercises/cs210_exercise_7
    • cs210_exercises/cs210_exercise_8
    • cs210_exercises/cs210_exercise_9
    • cs210_exercises/cs210_exercise_10
    • cs210_exercises/cs210_exercise_11
    • cs210_exercises/cs210_exercise_12
    • cs210_exercises/cs210_exercise_13
    • public_html
  3. Next change directory into your cs210_exercise_2 directory and run the following command:
    tree ~/cs210_exercises > ~/cs210_exercises/cs210_exercise_2/output.txt
  4. Terminate your session on blue.cs.sonoma.edu by entering the command, "exit" on the command line.
  5. Next retrieve your "output.txt" file on blue.cs.sonoma.edu using Secure File Transfer Protocol (sftp). Note: substitute your login username on blue.cs.sonoma.edu for "YOUR_USERNAME": sftp YOUR_USERNAME@blue.cs.sonoma.edu
  6. Next enter your password to login to blue.cs.sonoma.edu
  7. Once logged in via SFTP, enter the following commands:
    • cd cs210_exercises
    • cd cs210_exercise_2
    • get output.txt
    • exit
  8. Now the file "output.txt" should be on your personal computer OR on the lab computer (if you used a lab computer to SFTP). Upload the output.txt file to Canvas.

Hint:

  • mkdir

Submission Instructions:

Please submit the output.txt to Canvas.

Exercise 2 Rubric

CRITERIA RATINGS POINTS
Output file:
Contents of student's file submission (output.txt).		 Proficient
2 points
All directories are clearly indicated as being created in the student's home directory on blue.cs.sonoma.edu based on the contents of the output file, "output.txt". The student submitted an "output.txt" file that was created from the tree command outlined in step 3 of the instructions for this exercise.		 Satisfactory
1.4 points
Student generated a file named, "output.txt" that clearly indicates all the directories were created; However, the student did not use the tree command to display the output but used another command such as the ls command instead; OR the student uploaded an image screenshot to Canvas showing the directory structure they created in their home directory on Blue.		 Needs Improvement
1.2 points
Student did not create all the required directories per the instructions or the directory structure hierarchy is not correct. The student either provided the file "output.txt" (a text file) or submitted an image file screenshot of their home directory.		 Below Expectations
0 points
Either a blank output text file or blank image file was submitted or no file was submitted.		 2 points
Total points: 2