Task A: Get accounts and groups ready (70 points)

Step 1. Create three groups- employee, payroll, and admin. (You may refer to the slides for week-4

Group Management)

Step 2. Create three user accounts with a specified home directory for Sophia, Olivia, and Emma. Set

the primary group for Sophia, Olivia, and Emma to "employee", "payroll", and "admin", respectively.

And change their login shell to /bin/bash. Don't forget to set their passwords.

Step 3. Create a shared group called "your_midas" (replace it with your MIDAS name) and set this shared

group as the above accounts' secondary group. After this step, remember to check each user's group

profile.

Step 4. Create a directory named /home/cyse_project, which is to be owned by the your_midas group

which is a shared group). After this step, remember to check the permission of this shared directory.

Step 5. Change the permissions of the /home/cyse_project directory to "drwxrwx---" using the octal

method so that only the project group members have access to this directory. After this step, remember

to check the permission of this shared directory.

Step 6. Switch to Sophia's account. Change the default permissions using octal method with umask

command, to "-rw-r-----" for Sophia when she creates a file or directory. Check the value of umask, and

permission of a new file after this step.

Step 7. Create a new file called "Sophia_homework" in the home directory of Sophia and put your name

in the file as content. After this step, remember to check the content and the permission of the new file.

(ls -l Sophia_homework)

Step 8. Copy "Sophia_homework" to the /home/cyse_project directory. After this step, remember to

check the permission of the file in the shared directory.

Step 9. Switch to Emma's account. Try to read "Sophia_homework" in the /home/cyse_project

Directory.

Step 10. Exit out of Emmas account and Sophias account.

Task B: Set SGID permission (15 points)

Step 1. Switch to root account. To allow group members to access this file, you need to fix the sharing

issue by setting the correct SGID group values to /home/cyse_project directory, to give the group users

read permission.

Step 2. Switch to Sophia's account. Copy "Sophia_homework" to the /home/cyse_project directory as

"Sophia_homework2".

Step 3. Switch to Emma's account. Try to read "Sophia_ homework2" in the /home/cyse_project

directory.

Task C: Unset SGID permissions (15 points)

Step 1. Switch to root account. To disallow group members to access the files in the shared folder, you

need to fix the sharing issue by setting the correct SGID group values to /home/cyse_project directory

to remove the group user read permission.

Step 2. Switch to Sophia's account. Copy "Sophia_homework" to the /home/cyse_project directory as

"Sophia_homework3".

Step 3. Switch to Olivia's account. Try to read "Sophia_home3" in the /home/cyse_project directory

Need help with task B and C.