What does the following line mean when it is run in a script '#!/bin/bash'?

By default what file contains encrypted user passwords?

The at command allows you to execute a command at:

What does GRUB stand for?

The jobs command

To use chown recursively, instead of using _recursive you can use:

To create or edit a user cron table, you can use the ____ option to the crontab command.

Every computer contains a(n) ____ to send and receive data from other computers over a network.

____________ is a script or a tool that obtains privileges of a root?

____ components define the file system on unix/linux.

When using the chmod command, the mode rwx can be represented by the number ____.