3.1.2 Access Control

Select the term that matches the definition: The selective process of allowing or restricting the availability of a resource.

• access control

• open source

• GNU

• abstraction

Which of the following are part of the permission matrix for any given file or directory in Linux?

• owner

• group

• others

• admin

Linux file permissions can be changed for any file or directory to allow users to _________, _________, or _________.

Separate answers with a comma.

(a)  

The notation of "_" indicates a directory while a notation of "_" indicates an item is not a directory (such as file).

Separate answers with a comma.

(a)  

All files, this includes directories, are owned by one user and one group. Who is allowed access according to owner permissions?

• users

• users in a group

• everyone

• no one

All files, this includes directories, are owned by one user and one group. Who is allowed access according to group permissions?

• users

• users in a group

• everyone

• no one

All files, this includes directories, are owned by one user and one group. Who is allowed access according to others permissions?

• users

• users in a group

• everyone

• no one

Which group(s) have permission to execute the message.sh file?

Separate answers using a comma.

(a)  

Which group(s) have permission to write to the welcome.txt file?

Separate answers using a comma.

(a)  

What does the highlighted value indicate?

• Number of references (links/shortcuts)

• Owner of the file

• Group the file belongs to

• File size in bytes

• Timestamp