Linux File Permissions Quiz

If a directory has the permissions drwxrwsr-x, what is true about this directory?

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What does the command su - do when executed in a terminal?

• A. Switches to the root user without changing the current directory.

• B. Switches to the root user and changes to the root user's home directory.

• C. Switches to the specified user without changing the current directory.

• D. Switches to the specified user and keeps the environment variables unchanged.

What does the Defaults directive do in the sudoers file?

• A. It sets global default options for all users and commands.

• B. It assigns specific permissions to individual users.

• C. It removes permissions from specific users.

• D. It lists the default commands that can be run with sudo.

What is the purpose of the NOPASSWD tag in the sudoers file?

• A. It prevents the user from using the sudo command.

• B. It allows the user to execute commands without being prompted for their password.

• C. It disables password login for the specified user.

• D. It forces the user to change their password before using sudo.

Which configuration file is primarily used to define sudo permissions for users and groups?

• A. /etc/passwd

• B. /etc/group

• C. /etc/shadow

• D. /etc/sudoers

What does the sudo command do?

• A. Switches to the root user without a password.

• B. Executes a command as another user, typically the root user, with the user's password.

• C. Changes file permissions for the root user.

• D. Grants temporary root access for a user session.

Which of the following best describes the impact of setting the SGID bit on an executable file?

• A. The executable will run with the group ID of the file owner.

• B. The executable will run with the group ID of the user running the file.

• C. The executable will run with the group ID of the group owning the file.

• D. The executable will run with the group ID of the root user.

Which of the following files should typically have the SUID bit set for proper functionality?

• A. /bin/ls

• B. /usr/bin/passwd

• C. /usr/bin/grep

• D. /usr/bin/cat

Which command will allow a user to switch to the root user for the duration of a single command?

• A. su -

• B. sudo su

• C. sudo -i

• D. sudo

What is the primary purpose of the sticky bit when set on a directory?

• A. It allows files to be executed by any user.

• B. It prevents users from deleting or renaming files in the directory unless they own the file or the directory.

• C. It allows files to be created by any user in the directory.

• D. It ensures that the directory is read-only for all users.