删除最近7天没有访问的文件

#!/bin/bash
# Program:
#         This program is used to delete photo for outlink servers.
# History:
#         2007/08/23        chentao        1.1
#---------------------------------------------------------------
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH

photo_lists=/usr/local/crontab/file_list
photo_path=/var/photo

photo_directory=$(find $photo_path -maxdepth 1 -type d | sed '1d' | tee  /usr/local/crontab/total_directory)


today=$(date +%Y-%m-%d)
interval_time=7

echo "------------------------------------------------------------>" >> /var/log/del_log
echo "del start $(date  +[%Y/%m/%d/%H:%M:%S])" >> /var/log/del_log

for directory in $photo_directory
        do
        echo $directory
        find $directory -type f > $photo_lists

        for file in $(cat $photo_lists)
        do
                last_access_time=$(stat $file | tail -3 | grep Access | awk '{print $2}')
                today_s=$(date --date="$today" +%s)
                old_s=$(date --date="$last_access_time" +%s)
                interval_total_s=$(($today_s-$old_s))
                interval_day=$(($interval_total_s/60/60/24))
                echo "$interval_day"
                if [ "$interval_day" -gt $interval_time ]; then
                        echo "delete  file  $file"
                        rm -rf $file
                fi
        done
done

echo "del end   $(date  +[%Y/%m/%d/%H:%M:%S])" >> /var/log/del_log



最近2天又研究一下这段代码的效率，在一个偶然的时间发现了find命令的强大功能，直接可以找出7天前的文件，所以将这个脚本优化一下，代码如下：


#!/bin/bash
# Program:
#         This program is used to delete photo for outlink servers.
# History:
#         2007/08/23        chentao        1.1
#---------------------------------------------------------------
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH

photo_path=/opt/photo
photo_directory=$(find $photo_path -maxdepth 1 -type d | sed '1d' | tee /usr/loc
al/crontab/total_directory)



echo "------------------------------------------------------------>" >> /var/log
/del_log
echo "del start $(date  +[%Y/%m/%d/%H:%M:%S])" >> /var/log/del_log

for directory in $photo_directory
        do
        echo $directory
        find $directory -atime +15 -exec rm -rf {} \;
done

echo "del end   $(date  +[%Y/%m/%d/%H:%M:%S])" >> /var/log/del_log


2个脚本比较一下，果然优化后的脚本效率高很多！