# Introduction In the fiery depths of Demon Hell, a dark and foreboding place where only the bravest dare to tread, there lies a challenge waiting for the bold. Here, the Dark Lord of Hell reigns supreme, commanding his legions with iron-fisted control. However, even the Dark Lord needs order within his chaotic realm. To maintain the hierarchy of his demon army, his subjects’ identities must be meticulously managed and modified to reflect their rank and role. Your mission, should you choose to accept it, is to master the art of modifying user information on Linux — a skill that could tip the scales of power in Demon Hell. Prove yourself by wielding the `usermod` command effectively, showcasing your ability to manipulate user attributes with ease. Excel in this task, and you may earn the favor of the Dark Lord himself!
Click the virtual machine below to start practicing