1. Draw a Domain Access Matrix based on the following requirements:

• User1 , User2 , Group1, Group2 are the Domains

• Printer, /home/repo/repo.py , User1, User2 are the Objects

[ Note: Here User1 and User2 are given as objects because in UNIX/LINUX we can switch from one user domain to another]

Access Rights Set

User1:

• [ Printer , { Print}] , [/home/repo/repo.py , { Read, Write }] , [ User2,{Switch}]

User2:

• [/home/repo/repo.py,{Read}]

Group1:

• [ Printer,{print}], [/home/repo/repo.py, {Read, Write}]

Group2:

• [/home/repo/repo.py,{Read,Write,Execute}]

2. What Command is used to switch from one user domain to another in UNIX/LINUX?

3. What Command is used to execute commands with high privilege?

4. Assume user tom, creates a file tomfile.py and then sets the SETUID of this file. What would happen when the user jerry executes this file? Explain your answer

5. Write the command to set the SETUID of a file.

6. Create a file a.txt and set the file following file permission:

U	G	O
RWX	RW	R

1. What is Principle of least privilege? Give an example how it can be implemented