安装
wget https://jaist.dl.sourceforge.net/project/extundelete/extundelete/0.2.4/extundelete-0.2.4.tar.bz2
tar jxvf extundelete-0.2.4.tar.bz2
cd extundelete-0.2.4/
./configure
[root@linux extundelete-0.2.4]# ./configure
Configuring extundelete 0.2.4
configure: error: in `/usr/local/src/extundelete-0.2.4‘:
configure: error: C++ compiler cannot create executables
yum install gcc-c++.x86_64
[root@linux extundelete-0.2.4]# ./configure
Configuring extundelete 0.2.4
configure: error: Can‘t find ext2fs library
[root@linux extundelete-0.2.4]# yum -y install e2fsprogs-devel
[root@linux extundelete-0.2.4]# ./configure
[root@linux extundelete-0.2.4]# make
[root@linux extundelete-0.2.4]# make install
extundelete用法
[root@linux ~]# extundelete --help
Usage: extundelete [options] [--] device-file
Options:
--version, -[vV] Print version and exit successfully.
--help, Print this help and exit successfully.
--superblock Print contents of superblock in addition to the rest.
If no action is specified then this option is implied.
--journal Show content of journal.
--after dtime Only process entries deleted on or after ‘dtime‘.
--before dtime Only process entries deleted before ‘dtime‘.
Actions:
--inode ino Show info on inode ‘ino‘.
--block blk Show info on block ‘blk‘.
--restore-inode ino[,ino,...]
Restore the file(s) with known inode number ‘ino‘.
The restored files are created in ./RECOVERED_FILES
with their inode number as extension (ie, file.12345).
--restore-file ‘path‘ Will restore file ‘path‘. ‘path‘ is relative to root
of the partition and does not start with a ‘/‘
The restored file is created in the current
directory as ‘RECOVERED_FILES/path‘.
--restore-files ‘path‘ Will restore files which are listed in the file ‘path‘.
Each filename should be in the same format as an option
to --restore-file, and there should be one per line.
--restore-directory ‘path‘
Will restore directory ‘path‘. ‘path‘ is relative to the
root directory of the file system. The restored
directory is created in the output directory as ‘path‘.
--restore-all Attempts to restore everything.
-j journal Reads an external journal from the named file.
-b blocknumber Uses the backup superblock at blocknumber when opening
the file system.
-B blocksize Uses blocksize as the block size when opening the file
system. The number should be the number of bytes.
--log 0 Make the program silent.
--log filename Logs all messages to filename.
--log D1=0,D2=filename Custom control of log messages with comma-separated
Examples below: list of options. Dn must be one of info, warn, or
--log info,error error. Omission of the ‘=name‘ results in messages
--log warn=0 with the specified level to be logged to the console.
--log error=filename If the parameter is ‘=0‘, logging for the specified
level will be turned off. If the parameter is
‘=filename‘, messages with that level will be written
to filename.
-o directory Save the recovered files to the named directory.
The restored files are created in a directory
named ‘RECOVERED_FILES/‘ by default.
通过extundelete恢复单个文件
1.模拟数据误删除环境
以ext4文件系统为例
[root@linux ~]# mkdir /data
[root@linux ~]# mkfs.ext4 /dev/sdc1
[root@linux ~]# mount /dev/sdc1 /data/
[root@linux ~]# cp /etc/passwd /data
[root@linux ~]# mkdir /data/test
[root@linux ~]# echo "extundelete test" > /data/test/mytest.txt
[root@linux data]# md5sum passwd
f1a0dd6601afdab09a66ab7741c74f66 passwd
[root@linux data]# md5sum test/mytest.txt
eb42e4b3f953ce00e78e11bf50652a80 test/mytest.txt
[root@linux data]# rm -rf /data/*
2.卸载磁盘分区
[root@linux data]# cd /mnt/
[root@linux mnt]# umount /data
3.查询可恢复的数据信息
通过extundelete命令可以查询/dev/sdc1分区可恢复的数据信息
[root@linux /]# extundelete /dev/sdc1 --inode 2
NOTICE: Extended attributes are not restored.
Loading filesystem metadata ... 38 groups loaded.
Group: 0
Contents of inode 2:
0000 | ed 41 00 00 00 10 00 00 94 aa 75 58 54 aa 75 58 | .A........uXT.uX
0010 | 54 aa 75 58 00 00 00 00 00 00 02 00 08 00 00 00 | T.uX............
0020 | 00 00 08 00 05 00 00 00 0a f3 01 00 04 00 00 00 | ................
0030 | 00 00 00 00 00 00 00 00 01 00 00 00 d5 21 00 00 | .............!..
0040 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................
0050 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................
0060 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................
0070 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................
0080 | 1c 00 00 00 c8 15 0b 0d c8 15 0b 0d dc 36 bf 4b | .............6.K
0090 | b2 a8 75 58 00 00 00 00 00 00 00 00 00 00 00 00 | ..uX............
00a0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................
00b0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................
00c0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................
00d0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................
00e0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................
00f0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................
Inode is Allocated
File mode: 16877
Low 16 bits of Owner Uid: 0
Size in bytes: 4096
Access time: 1484106388
Creation time: 1484106324
Modification time: 1484106324
Deletion Time: 0
Low 16 bits of Group Id: 0
Links count: 2
Blocks count: 8
File flags: 524288
File version (for NFS): 0
File ACL: 0
Directory ACL: 0
Fragment address: 0
Direct blocks: 127754, 4, 0, 0, 1, 8661, 0, 0, 0, 0, 0, 0
Indirect block: 0
Double indirect block: 0
Triple indirect block: 0
File name | Inode number | Deleted status
. 2
.. 2
lost+found 11 Deleted
passwd 12 Deleted
test 128513 Deleted
根据上面输出，标记为Deleted状态的是已经删除的文件或目录，同时，还可以看到每个已删除文件inode值，接下来就可以恢复文件了
4.恢复单个文件
执行如下命令开始恢复文件
extundelete /dev/sdc1 --restore-file passwd
原文地址：http://yinqiang1119.blog.51cto.com/10869441/1891076
