I woke my computer up from sleep and tried to run ssh. Surprise alligators! I encountered the odd error message “You don’t exist! go away!” It turns out that my dying hard drive had trashed some very important system files containing my computer login and password information. Trying to start up Terminal, I got the error “The administrator has set your shell to an illegal value”. I couldn’t access a large chunk of my files (due to lack of permissions) and my Dock was totally trashed. Solution? Start X11 from your utilities folder.