Day 9 Review on Day 10

What are the three parts of file ownership in Linux?

• User, Group, Permissions

• Owner, Role, Access

• Admin, Group, Rights

• User, Role, Attributes

Answer explanation

In Linux, file ownership consists of three parts: User (the owner of the file), Group (the group associated with the file), and Permissions (the access rights for the user and group). Thus, the correct answer is 'User, Group, Permissions'.

What is the octal code for read, write, and execute permissions?

• 7

• 8

• 6

• 5

Answer explanation

The octal code for read (4), write (2), and execute (1) permissions is calculated by adding these values: 4 + 2 + 1 = 7. Therefore, the correct answer is 7.

How can you change file ownership using a file manager?

• Use the command line to change the file type instead of ownership.

• Right-click the file, select 'Properties', go to 'Permissions' or 'Security', and change the owner.

• Double-click the file to open it and change the owner in the application.

• Select the file and press 'Delete' to remove it from the system.

Answer explanation

To change file ownership using a file manager, right-click the file, select 'Properties', and navigate to 'Permissions' or 'Security' to change the owner. This is the correct method for modifying ownership.

What are special permissions in Linux?

• read, write, execute

• setuid, setgid, and sticky bit

• owner, group, others

• chmod, chown, chgrp

Answer explanation

Special permissions in Linux include setuid, setgid, and the sticky bit. These permissions modify how executable files and directories behave, allowing for enhanced security and user access control.

What does the directory execute bit allow you to do?

• The execute bit allows you to create new files in the directory.

• The execute bit allows you to access and traverse the directory.

• The execute bit allows you to delete files in the directory.

• The execute bit enables you to change the directory's permissions.

Answer explanation

The execute bit on a directory allows users to access and traverse it, meaning they can enter the directory and access its contents. This is essential for navigating the file system.

What does directory write permission allow a user to do?

• Allows a user to create, delete, or rename files and subdirectories.

• Allows a user to view files and subdirectories only.

• Allows a user to change file permissions.

• Allows a user to access files without restrictions.

Answer explanation

Directory write permission allows a user to create, delete, or rename files and subdirectories, enabling them to manage the contents of the directory effectively.

What are symbolic codes in the context of file permissions?

• Numeric codes representing file permissions: 4 for read, 2 for write, 1 for execute.

• A method for encrypting files to protect permissions.

• A graphical interface for managing file permissions.

• Symbolic codes are letters representing file permissions: 'r' for read, 'w' for write, 'x' for execute, organized into owner, group, and others.

Answer explanation

Symbolic codes represent file permissions using letters: 'r' for read, 'w' for write, and 'x' for execute. They are organized into three categories: owner, group, and others, making it easy to understand and manage permissions.

What is the purpose of the user mask (umask) in Linux?

• To monitor system performance and resource usage.

• To set default file permissions for newly created files and directories.

• To manage user accounts and permissions.

• To encrypt files for security purposes.

Answer explanation

The user mask (umask) in Linux is used to set default file permissions for newly created files and directories, determining the access rights for users and groups.

What is a sticky bit and how does it function?

• A sticky bit is a type of encryption for files.

• A sticky bit is a permission that restricts file deletion in shared directories to the file's owner.

• A sticky bit allows any user to delete files in a directory.

• A sticky bit is a setting that increases file size automatically.

Answer explanation

A sticky bit is a permission setting that ensures only the file's owner can delete or rename their files in shared directories, preventing other users from removing files they do not own.

How can you hide files in a Linux directory?

• Rename the file to include a space.

• Move the file to a different directory.

• Change the file extension to .hidden.

• Prefix the filename with a dot (.) to hide it.

Answer explanation

In Linux, files prefixed with a dot (.) are hidden by default. This means that renaming a file to start with a dot will make it invisible in standard directory listings, making it the correct method to hide files.