Lab Summary Sheet
Student Name and ID: Rafael Rodriguez / 4813322
Lab Title (Source): Software: Environmental Variable and Set-UID
Time Invested: approximately 6- 8 hours
Summary of insights gained (a paragraph of personal reflections on the value of the topic and
lab):
As a regular Linux user, I found this lab to be very insightful in regards to the security of system
files. This lab highlights the importance of proper permissions and security issues that can arise
from poor programming and insecure root accounts. Prior to this lab my knowledge of
environmental variables and Set-UID on Linux was very limited and this lab has definitely
improved my understanding of these concepts. As far as the time spent for this lab, I didn’t
have time to complete the lab in one sitting as it was a busy week and instead I worked on it
daily in 20-30 min intervals which resulted in spending more time than planned to complete the
lab as I had to go back and forward to remember my progress. Overall I found this topic very
interesting as I had not seen much of what was covered in this lab in my master’s program and
it will definitely be useful in the future.
Resources used other than lab guides (cheat sheet or tutorial or other):
Task 1: usage of export, set and unset commands:
https://www.digitalocean.com/community/tutorials/how-to-read-and-set-environmental-and-s
hell-variables-on-a-linux-vps
Task 6: reference for changing system path and malicious use of Set-UID:
https://www.cs.purdue.edu/homes/bb/cs348/www-S08/unix_path.html
http://www.cis.syr.edu/~wedu/Teaching/cis643/LectureNotes_New/Set_UID.pdf
This summary is submitted in addition to any screenshots or other documentation related to a lab for CIS 5370. Submitting
this form is a statement of original work by the student whose name appears above.
Task 1: Manipulating Environment Variables
screenshot “printenv” commands: