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  town

who | grep sleeping
who | grep awake
who | egrep 'bad|good'
for (goodness sake) {
        be good
}