better !pout !cry better watchout lpr why santa claus < north pole >town cat /etc/passwd >list ncheck list ncheck list cat list | grep naughty >nogiftlist cat list | grep nice >giftlist santa claus < north pole >town who | grep sleeping who | grep awake who | egrep 'bad|good' for (goodness sake) { be good } (by Frank Carey, AT&T Bell Laboratories, 1985)