shell腳本學習（二）：文件比較等操作

對應《Linux命令行與shell腳本編程大全》 -- 章節12.4.3

test1： -d file :檢查目錄

#!/bin/bash
dir="/home//shell/dir"
if [ -d $dir ]
then
        echo "dir is exist"
        cd $dir
        ls
else
        echo "dir is not exist!"
fi

結果：
dir is exist
one  two

test2：-e file :檢查對象是否存在

#!/bin/bash
dir="/home//shell/dir"
file="one"
if [ -e $dir ]
then #dir exist
        echo "OK!$dir is exist!"
        echo "Now start check the file:$file"
        if [ -e $dir/$file ]
        then #file exist
                echo "OK!$file is exist!"
                date >> $dir/$file
                cat $dir/$file
        else #file not exist
                echo "Sorry!$file is not exist!"
        fi
else #dir not exist
        echo "Sorry!$dir is not exist!"
fi

結果：
OK!/home//shell/dir is exist!
Now start check the file:one
OK!one is exist!

test3：