Regular users:
!trivia - To start the trivia (usually it's already started. but if it isn't, try typing !trivia or !enable and then !trivia)
!hof - Show hall of fame .
!hoffast - Show fall of fame of the fastest players.
!hofstreak - Show fall of fame of the the players with the most questions in a row.
!hofwpm - Show hall of fame of the users with the best word per min.
!records - Show the records.
!report question - problem - If you want to report us a problem to correct, use the trigger !report and write the exact questions (exact wording) and the problem. (for example: !report question What is the name of the beer that Marcel pitches in ads? - the better answer is Monkey shine).
!hint - Get a hint (notice: you'll get 3 hints automatically. every hint is decreasing the points you'll get in 1 point)
!vowels - Show vowels
!repeat - Repeat the last question
!ping - Test your ping from the server. basically, your ping would be the time until the server gets your answer. (for example, if it said   ^Lior, your ping is 0.592 secs it means that it takes 0.592 seconds from the moment I sent the answer until the server actually gets it.)

Half Operators:
All the above and:

/kick nickname reason - Kick someone out of the channel. for example: if you need to kick Lior for making a mess, type /kick lior stop making a mess

/mode #friendscafe-trivia +b nickname - Ban someone from the channel. (if you do that, kick him after that.) for example, /mode #friendscafe-trivia +b lior

/mode #friendscafe-trivia -b nickname - Unban someone. for example, /mode #friendscafe-trivia -b lior

/mode #friendscafe-trivia +v nickname - Voice some one. (Use only if he posted 25 questions or more)

(If you're usings mIRC, you can just right click the user you want to kick/ban, select control>kick (why) or Ban.)