#!/bin/bash
ARG_COUNT=1
E_NO_ARG=61
E_NOT_DIR=62
if [ $# -ne "$ARG_COUNT" ]; then
echo "Usage: `basename $0` directory_name"
exit $E_NO_ARG
fi
dir=$1
if [ ! -d "$dir" ]; then
echo "$dir is not a directory"
exit $E_NOT_DIR
fi
for file in $dir/*
do
whatis `basename $file`
done
exit 0
示例：
./whatdemo.sh /usr/bin
./whatdemo.sh "/usr/bin/"&>>usrbin.db
