F3 Linux User Management Quiz

Which command is used to set a password for a user account in Linux?

• `sudo passwd -u username`

• `sudo userpasswd username`

• `sudo passset username`

• `sudo usermod -p password username`

Which command allows a user to switch to a different user and execute a command as that user?

• `sudo`

• `su -`

• `pkexec`

• `visudo`

What is the purpose of the "sudo" command in Linux?

• To switch to a different user

• To run a command as a different user with administrative privileges

• To edit the sudoers file

• To check file syntax using visudo

Where is the "sudoers" file located in a Linux system?

• `/etc/sudoers`

• `/etc/sudo`

• `/etc/visudo`

• `/etc/sysconfig/sudoers`

Which command is used to open and edit the "sudoers" file?

• `visudo`

• `sudoedit`

• `nano /etc/sudoers`

• `editsudoers`

Which of the following is a valid use of the "PolicyKit" (PolKit) utility in Linux?

• To switch between users

• To manage who can perform operations requiring administrative privileges

• To edit the sudoers file

• To check file syntax using visudo

Which command is commonly used with PolicyKit to execute a program as another user?

• `su -`

• `pkexec`

• `sudoedit`

• `polkitexec`

What does the "visudo" command do before allowing edits to the "sudoers" file?

• Checks if the file is open by another user

• Opens the file in read-only mode

• Deletes the file contents

• Prompts for root password

Explain why it is important to use the `visudo` command instead of directly editing the `sudoers` file with a text editor.

• It prevents syntax errors that could lock out administrative access.

• It automatically backs up the `sudoers` file.

• It allows multiple users to edit the file simultaneously.

• It provides a graphical interface for editing.

How does the `pkexec` command differ from `sudo` in terms of user authentication?

• `pkexec` uses a graphical authentication dialog, while `sudo` uses terminal-based authentication.

• `pkexec` does not require a password, while `sudo` does.

• `pkexec` can only be used by root, while `sudo` can be used by any user.

• `pkexec` is faster than `sudo`.