只备份某个目录下新产生的文件

以网页下的文件为例

/var/www/html/  网页目录

echo 1111 > /var/www/html/a.html

echo 2222 > /var/www/html/b.html

vim /shell/web.sh

#!/bin/bash

webdir=/webbakdir

if [ ! -e $webdir ];then

mkdir $webdir

fi

cd /var/www/html

for file in `ls *.html`

do

if [ ! -e $webdir/$file ];then

cp $file $webdir

fi

done

执行脚本并查看

[[email protected] webbackdir]sh web.sh

[[email protected] webbackdir]# ls /webbackdir

a.html  b.html

为了节省空间可以将备份压缩

#!/bin/bash

webdir=/webbakdir

day=`date +%F`

if [ ! -e $webdir ];then

mkdir $webdir

fi

cd /var/www/html

for file in `ls *.html`

do

if [ ! -e $webdir/$file ];then

tar -zcf $webdir/web-${day}.tar.gz  $file &> /dev/null

fi

done