At some point we all have to remember that the monitor showing these commands is also an actor, and not actually a computer hooked up to a special laser that scans your body, destroys it, and pulls you into a 1980's era computer still managing to have, per the screenshot in the blog post, about 4GB of memory free in some respect.

Same as how Garrett Hedlund is neither a youthful stock owner in a computer company, nor intrinsically knows Unix shell commands.

Maybe it's a compromised sshd that dropped him in after printing the "Login incorrect".