shell脚本——test命令练习

#! /bin/bash

if [ $# -ne 1 ]
then
    echo arguments not valid
    exit 1
fi
if [ ! -e "$1" ]
then
    echo not exist
    exit 2
fi
if [ -f "$1" ]
then
    echo regulare file
fi
if [ -d "$1" ]
then
    echo directory
fi
if [ -r "$1" ]
then
    echo readable
fi
if [ -w "$1" ]
then
    echo writable
fi
if [ -x "$1" ]
then
    echo executable
fi