make DESTDIR=/ PREFIX=/usr install

$ cat fib
n="$1"
if [ "$n" -eq 0 ] ; then echo 0
elif [ "$n" -eq 1 ] ; then echo 1
else
	a="$(MEMOIZE_CACHE="/tmp/${USER}-memoize" memoize 9999 sh fib $((n-1)))"
	b="$(MEMOIZE_CACHE="/tmp/${USER}-memoize" memoize 9999 sh fib $((n-2)))"
	echo "$a + $b" | bc
fi
$ sh fib 100
354224848179261915075
$ sh fib 200
280571172992510140037611932413038677189525