[root@localhost ~]# uname -a
Linux localhost.localdomain 2.6.18-8.el5 #1 SMP Fri Jan 26 14:15:21 EST 2007 i686 i686 i386 GNU/Linux
其实什么版本的系统无所谓 !
所需的相关库
[root@localhost ~]# rpm -qa |grep e2fsprogs
e2fsprogs-libs-1.39-8.el5
e2fsprogs-1.39-8.el5
e2fsprogs-devel-1.39-8.el5
必须要有e2fsprogs-libs,不然在后面ext3grep的安装会有问题。
分区情况:
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
6.2G 1.8G 4.2G 30% /
/dev/sda1 99M 11M 83M 12% /boot
/dev/mapper/VolGroup00-LogVol02
1008M 34M 924M 4% /data
tmpfs 125M 0 125M 0% /dev/shm
需要软件
先下载软件
[root@localhost ~]# cd /root/src/
[root@localhost src]# wget
[root@localhost src]# ls
ext3grep-0.10.2.tar.gz
[root@localhost src]# tar -zxvf ext3grep-0.10.2.tar.gz
[root@localhost ext3grep-0.10.2]# ./configure
[root@localhost ext3grep-0.10.2]# make install
[root@localhost ext3grep-0.10.2]# ext3grep
Running ext3grep version 0.10.2
编译然后测试可以使用了,一切做好了以后开始我们的恢复过程。
我的目录是/data分区,我先格式化了分区,我放一个文件在根目录下和一个子目录下的文件。
/dev/mapper/VolGroup00-LogVol02 1008M 34M 924M 4% /data
下面斜体部分不是必须的:
其实这里用什么分区倒是无所谓,也可以模拟一个出来,下面是模拟步骤:
1. mkdir /data1/
2. cd /data1/
3. dd if=/dev/zero of=disk1 count=2048000
4. mkfs.ext3 disk1
5. mkdir -p /dfs/a
6. mount -o loop /data1/disk1 /dfs/a
这里,我们用/data分区,先拷贝些文件过去
[root@localhost ~]# ]# cp /bin/ls /data/
[root@localhost ~]# ]# cp -rf /bin /data/
[root@localhost ~]# ]# ls -la /data/
total 136
drwxr-xr-x 4 root root 4096 Apr 21 17:37 .
drwxr-xr-x 25 root root 4096 Apr 21 17:11 ..
drwxr-xr-x 2 root root 4096 Apr 21 17:37 bin
drwx—— 2 root root 16384 Apr 21 17:15 lost+found
-rwxr-xr-x 1 root root 93560 Apr 21 17:37 ls
[root@localhost ~]#
一个子目录一个可执行文件
现在删除ls文件和bin下面的zcat
[root@localhost ~]# rm /data/ls
rm: remove regular file `/data/ls’? y
[root@localhost ~]# rm /data/bin/zcat
rm: remove regular file `/data/bin/zcat’? y
[root@localhost ~]# ls -la /data/ls /data/bin/zcat
ls: /data/ls: No such file or directory
ls: /data/bin/zcat: No such file or directory
文件没有了然后我们来恢复:
首先必须umount掉误删除数据的分区:
[root@localhost ~]# umount /dev/mapper/VolGroup00-LogVol02
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
6.2G 1.8G 4.2G 30% /
/dev/sda1 99M 11M 83M 12% /boot
tmpfs 125M 0 125M 0% /dev/shm
确认卸载,然后使用ext3grep来恢复。
[root@localhost ~]# ext3grep /dev/mapper/VolGroup00-LogVol02 --ls --inode 2
这里会创建扫描分区
[root@localhost ~]# ext3grep /dev/mapper/VolGroup00-LogVol02 --ls --inode 2
[root@localhost ~]# ext3grep /dev/mapper/VolGroup00-LogVol02 --restore-file ls
Running ext3grep version 0.10.2
WARNING: I don’t know what EXT3_FEATURE_COMPAT_EXT_ATTR is.
Number of groups: 8
Minimum / maximum journal block: 585 / 8787
Loading journal descriptors… sorting… done
Number of descriptors in journal: 58; min / max sequence numbers: 2 / 5
Loading VolGroup00-LogVol02.ext3grep.stage2… done
Restoring ls
[root@localhost ~]# ext3grep /dev/mapper/VolGroup00-LogVol02 --restore-file bin/ls
Running ext3grep version 0.10.2
WARNING: I don’t know what EXT3_FEATURE_COMPAT_EXT_ATTR is.
Number of groups: 8
Minimum / maximum journal block: 585 / 8787
Loading journal descriptors… sorting… done
Number of descriptors in journal: 58; min / max sequence numbers: 2 / 5
Loading VolGroup00-LogVol02.ext3grep.stage2… done
Restoring bin/ls
[root@localhost ~]# ls -la RESTORED_FILES/
total 124
drwxr-xr-x 3 root root 4096 Apr 21 18:01 .
drwxr-x— 5 root root 4096 Apr 21 17:55 ..
-rwxr-xr-x 1 root root 93560 Apr 21 17:48 ls
[root@localhost ~]# ext3grep /dev/mapper/VolGroup00-LogVol02 --restore-file bin/zcat
Running ext3grep version 0.10.2
WARNING: I don’t know what EXT3_FEATURE_COMPAT_EXT_ATTR is.
Number of groups: 8
Minimum / maximum journal block: 585 / 8787
Loading journal descriptors… sorting… done
Number of descriptors in journal: 58; min / max sequence numbers: 2 / 5
Loading VolGroup00-LogVol02.ext3grep.stage2… done
Restoring bin/zcat
[root@localhost ~]# ls -la RESTORED_FILES/bin/
total 188
drwxr-xr-x 2 root root 4096 Apr 21 18:01 .
drwxr-xr-x 3 root root 4096 Apr 21 18:01 ..
-rwxr-xr-x 1 root root 62136 Apr 21 17:48 zcat
看看都恢复在RESTORED_FILES目录下,大小也一样,这里RESTORED_FILES目录是执行ext3grep的当前目录下!
也可以使用:
ext3grep /termite/cc-disk --restore-all
恢复所有文件和目录,但是目录的话,如果删除时间较长,不一定能完全恢复,压缩文件一般都能恢复。
如果想详细的了解ext3grep,可以到它的的HOW TO页去看看:
转自:
http://hi.baidu.com/shanyefeng/blog/item/0062c5387dad092496ddd801.html
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