extundelete恢复Linux被删除文件

联系:手机(+86 13429648788) QQ(107644445)QQ咨询惜分飞

标题:extundelete恢复Linux被删除文件

作者:惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

今天群中有个朋友的客户闲着没事rm掉了数据文件,然后讨论到使用extundelete进行了恢复,抢救了部分未被覆盖的数据文件。该软件官方地址:http://extundelete.sourceforge.net/
安装extundelete

[root@xifenfei tmp]# bunzip2 extundelete-0.2.0.tar.bz2
[root@xifenfei tmp]# tar xvf extundelete-0.2.0.tar
extundelete-0.2.0/
extundelete-0.2.0/README
extundelete-0.2.0/acinclude.m4
extundelete-0.2.0/configure.ac
extundelete-0.2.0/aclocal.m4
extundelete-0.2.0/Makefile.am
extundelete-0.2.0/Makefile.in
extundelete-0.2.0/config.h.in
extundelete-0.2.0/configure
extundelete-0.2.0/compile
extundelete-0.2.0/depcomp
extundelete-0.2.0/install-sh
extundelete-0.2.0/missing
extundelete-0.2.0/LICENSE
extundelete-0.2.0/autogen.sh
extundelete-0.2.0/src/
extundelete-0.2.0/src/Makefile.am
extundelete-0.2.0/src/Makefile.in
extundelete-0.2.0/src/extundelete.cc
extundelete-0.2.0/src/block.c
extundelete-0.2.0/src/insertionops.cc
extundelete-0.2.0/src/block.h
extundelete-0.2.0/src/extundelete.h
extundelete-0.2.0/src/extundelete-priv.h
extundelete-0.2.0/src/jfs_compat.h
extundelete-0.2.0/src/kernel-jbd.h
[root@xifenfei tmp]# cd extundelete-0.2.0
[root@xifenfei extundelete-0.2.0]#  ./configure
Configuring extundelete 0.2.0
Writing generated files to disk
[root@xifenfei extundelete-0.2.0]# make && make install
make -s all-recursive
Making all in src
Making install in src
  /usr/bin/install -c 'extundelete' '/usr/local/bin/extundelete'

恢复操作命令

--umount或者read only 分区(如果umount不成功,可以通过fuser -km /www类似方法找出来占用进程)
 umount /dev/partition
 mount -o remount,ro /dev/partition

--恢复文件
extundelete /dev/partition --restore-all
extundelete /dev/partition --restore-directory /backup/gnutool-delete
extundelete /dev/partition --restore-files /etc/passwd 

测试恢复

--基于目录恢复
[root@xifenfei tmp]#extundelete /dev/sdb1  --restore-directory /u01/xifenfei
Loading filesystem metadata ... 160 groups loaded.
Loading journal descriptors ... 23 descriptors loaded.
Writing output to directory RECOVERED_FILES/
Failed to restore file /u01/xifenfei
Could not find correct inode number past inode 2.
[root@xifenfei tmp]# cd RECOVERED_FILES/
[root@xifenfei RECOVERED_FILES]# ll
total 0
--未成功

--基于磁盘恢复
[root@xifenfei RECOVERED_FILES]#extundelete /dev/sdb1  --restore-all
Loading filesystem metadata ... 160 groups loaded.
Loading journal descriptors ... 23 descriptors loaded.
Writing output to directory RECOVERED_FILES/
Searching for recoverable inodes in directory / ... 
4 recoverable inodes found.
Looking through the directory structure for deleted files ... 
Failed to restore inode 1966081 to file RECOVERED_FILES/xifenfei:Inode does not correspond to a regular file.
Restored inode 1966082 to file RECOVERED_FILES/xifenfei/xff.txt
Failed to restore inode 1966083 to file RECOVERED_FILES/xifenfei/xff:Inode does not correspond to a regular file.
Restored inode 1966084 to file RECOVERED_FILES/xifenfei/xff/xff.txt132
0 recoverable inodes still lost.
[root@xifenfei RECOVERED_FILES]# ll
total 4
drwxr-xr-x 3 root root 4096 Aug 31 21:36 RECOVERED_FILES
[root@xifenfei RECOVERED_FILES]# cd RECOVERED_FILES/
[root@xifenfei RECOVERED_FILES]# ll
total 4
drwxr-xr-x 3 root root 4096 Aug 31 21:36 xifenfei
[root@xifenfei RECOVERED_FILES]# cd xifenfei/
[root@xifenfei xifenfei]# ll
total 20
drwxr-xr-x 2 root root  4096 Aug 31 21:36 xff
-rw-r--r-- 1 root root 13231 Aug 31 21:36 xff.txt
[root@xifenfei xifenfei]# cd xff
[root@xifenfei xff]# ll
total 16
-rw-r--r-- 1 root root 13231 Aug 31 21:36 xff.txt132
--恢复成功

--基于文件恢复
[root@xifenfei xff]# extundelete /dev/sdb1  --restore-files /u01/xifenfei/xff.txt
Loading filesystem metadata ... 160 groups loaded.
Loading journal descriptors ... 23 descriptors loaded.
Writing output to directory RECOVERED_FILES/
[root@xifenfei xff]# cd RECOVERED_FILES/
[root@xifenfei RECOVERED_FILES]# ll
total 0
--未成功

通过上述实验证明extundelete还是有很大的不完整性,基于整个磁盘的恢复功能较为强大,基于目录和文件的恢复还不够强大.不过该软件在很多时候还是有救火的功能,特别是当蛋筒的人员删除了数据库的部分文件之时.

此条目发表在 Linux 分类目录。将固定链接加入收藏夹。

extundelete恢复Linux被删除文件》有 3 条评论

  1. xxx 说:

    我自己改了源码,是不很好,但是问题暂时解决。

    并且,我已经提交了bug,对方已经升级到0.2.2版本,问题已经解决了。

      [引用]  [回复]

  2. 惜分飞 说:

    xxx,

    没有做过大文件测试,不能保证,但是从原理上说文件大小是一样的,除非你的大文件部分被覆盖掉了

      [引用]  [回复]

  3. xxx 说:

    大文件有些问题,我测试过恢复18G的文件,结束时缩小到1.5G。

      [引用]  [回复]

发表评论

电子邮件地址不会被公开。 必填项已用 * 标注

您可以使用这些 HTML 标签和属性: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>