Linux Administration Bootcamp: Go from Beginner to Advanced - File and Directory Permissions Explained - Part 2

The video tutorial covers the concept of primary groups and how they affect file group assignments. It explains directory permissions and their impact on file execution. The tutorial also delves into the file creation mask and the UMASK command, illustrating how they determine default permissions for files and directories. Common UMASK modes and special modes are discussed, along with practical examples of using UMASK to manage permissions effectively.

What command is used to change the group of a file?

• CHMOD

• CHOWN

• CGRP

• UMASK

What can prevent the execution of a file even if its permissions are correct?

• Improper directory permissions

• File size too large

• Wrong file type

• Incorrect file name

What is the default permission for directories if no mask is used?

• 777

• 666

• 755

• 644

How does the UMASK command affect file permissions?

• It divides permissions

• It adds permissions

• It subtracts permissions

• It multiplies permissions

What is the result of subtracting a UMASK of 022 from 777 for directories?

• 666

• 775

• 644

• 755

Which of the following is a special mode in file permissions?

• Hidden

• Read-only

• Executable

• Set UID

How many characters does UMASK display when run without arguments?

• Four

• Three

• Two

• Five