From the README:
To play, the user logs in to a machine with to an advertised user/pass where the user's login shell is the 'trivia' program in the user's home directory. The banner built into the code indicates the 'trivia' user via ssh, but there is no reason telnet and a different username could not be used. On login the player is greeted and prompted for a handle and asked to wait for the next round. At the next round a question is provided with lettered choices. An incorrect answer resets the user's score to zero. A correct answer increases it by one. The current winner is whoever has had the most consecutive correct answers. There is no interactive timeout, but failure to answer in the correct time results in a reset score, which is indicated when the user finally does submit an answer.
It is simple to install and simple to administer on the fly (in the middle of a "game"). It is tiny (~5K for all three scripts combined), but has a surprising amount of functionality and is very flexible, allowing for a great deal of hot configuration from control files that are read at the beginning of each round.
The trivia-o-matic coding style is a reflection of the context of the moment. It emphasizes simple & elegant idioms, robust functionality as a side-effect of flexible solutions, conciseness of code, and not-shooting-for-the-moon. Some people may (perhaps rightfully) accuse this style of being unreadable, but it is effective for when and where it was needed.
You can download a tarball (6K), or you can check out the individual files.
If you enjoy it and use it and want to contribute your questions file, I'll share it with the world.
License: Creative Commons Zero License
To the extent possible under law, I, Bart Grantham, have waived all copyright and related or neighboring rights to Trivia-o-matic. This work is published from the United States.