In college, some of our computers in the lab were old AIX Unix machines with character-mode logins. I was able to duplicate that logic screen with a program tha

In college, some of our computers in the lab were old AIX Unix machines with character-mode logins. I was able to duplicate that logic screen with a program that would write the password to a file in my directory, then give an error message, logout and present the normal login screen. Users would think they typed their passwords incorrectly and then login again. It was naive of me because anyone who was on to me could have just killed the program and gotten access to my home directory. After realizing how easy this was, I always made it a point to try and terminate the login screen, whenever I sat down at the console.