Christmas Song for Unix Hackers

        better !pout !cry
        better watchout
        lpr why
        santa claus &lt north pole >town

        cat /etc/passwd >list
        ncheck list
        ncheck list
        cat list | grep naughty >nogiftlist
        cat list | grep nice >giftlist
        santa claus &lt 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)