#!/bin/bash

if [ $# -ne 1 ] ; then
    echo "Usage $0 <dir>"
    exit 1
fi

if [ ! -d "$1" ]
then
    echo "$1 is not a directory"
    exit 1
fi

cd "$1"
rm -f summary.out
for i in * ; do  # for i in $(ls) ; do
    if [ -d "$i" ] ; then
        echo "$i": $[`ls -l "$i" | wc -l`-1] elements >> summary.out 
    elif [ -f "$i" ] ; then
        echo "$i": $(head -c 10 "$i") >> summary.out
    fi
done

exit 0