避免误删文件：Linux回收站机制

为了避免工作中误删除导致出现重大事情，影响工作内容，可以为所有服务器用linux回收站机制来解决误删问题。这样总比花时间恢复付出的代价小得多。

命令支持：

rm -rf /data/test* /data/00000  /data/023-rf-r-f  /home/steven/dddd  /home/steven/  dirdir/ /home/steven/test* ddd

rm -rf *

禁止 rm -rf /

开发平台：CentOS6.4 X86_64

1、编写回收站脚本程序 rm.py

#!/usr/bin/env python
# Linux Recycle
# Author Steven
# Modify 2013 - 12 - 17
import time,sys,os,shutil
recy_path = "/data/Recycle/"
now = time.strftime( '%Y%m%d_%H_%M_%S' ,time.localtime(time.time()))
if not os.path.isdir(recy_path):
os.mkdir(recy_path)
para = sys.argv[ 1 :]
if '-f' in para:
para.remove( '-f' )
if '-r' in para:
para.remove( '-r' )
if '-rf' in para:
para.remove( '-rf' )
if '/' in para:
para.remove( '/' )
print "Dangerous command: /"
for f in para:
try :
if '/' not in f:
recy_file = "%s/%s_%s" % (recy_path,now,f)
shutil.move(f,recy_file)
else :
path = os.path.dirname(f)
file = os.path.basename(f)
if file == "" :
file = path.split( '/' )[- 1 ]
recy_file = "%s/%s_%s" % (recy_path,now,file)
shutil.move(f,recy_file)
except Exception,e:
print e

2、其他步骤

chmod 755 /bin/rm.py

chmod 777 /data/Recycle   回收站目录

echo "alias rm='/bin/rm.py'" >> /etc/bashrc

chattr +i /bin/rm.py 给文件加锁，禁止修改。

3、删除文件测试

rm  /root/text.txt

此时，text.txt文件就会被mv 到 回收站目录 /data/Recycle

4、删除回收站文件

/bin/rm -rf /data/Recycle/text.txt

5、回收站机制是为了解决不小心误删问题，如果确定某个文件永久删除则直接进行删除

/bin/rm -rf  filename

6、为防止回收站目录遗留文件过多而占用太多的硬盘资源，使用crontab定时删除历史文件

a、编写定时删除回收站文件程序脚本

[root@localhost ~]# cat clean_recycle.sh
#!/bin/sh
# Author Steven
# Modify 20130305
dirpath=/data/Recycle/
ago=`date -d "-15 day" +%Y%m%d`
if [ ! -d $dirpath ];then
echo "This path [${dirpath}] not exist, please check."
exit
fi
for i in `ls $dirpath`
do
# Get datestamp and check it. For example: 20130304_09_54_25_ld.lock
datestamp=`echo $i | awk -F '_' '{print $1}' `
check=`echo "$datestamp" | grep "^[0-9]\{8\}$" `
if [[ `echo $check` -ne "" ]];then
# Remove old files.
if [ "$datestamp" -lt "$ago" ];then
/bin/rm -rf $dirpath/$i
fi
fi
done

b、添加计划任务

crontab -e

1 5 * * 0 sh /root/clean_recycle.sh

c、回收站内容

[root@master ~]# ls /data/Recycle/
20131217_19_01_26_                  20131217_19_05_48_test33.txt      20131217_19_19_30_test0df-. 211 .txt  20131217_19_20_50_test1.txt
20131217_19_05_48_                  20131217_19_05_48_test3436.txt    20131217_19_19_30_test1.txt         20131217_19_20_50_test322.txt
20131217_19_05_48_000               20131217_19_05_48_testdd.txt      20131217_19_19_30_test322.txt       20131217_19_20_50_test33.txt
20131217_19_05_48_0234-f12-rf       20131217_19_05_48_testdgg.txt     20131217_19_19_30_test33.txt        20131217_19_20_50_test3436.txt