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```

[root@localhost ~]# df -h

Filesystem      Size  Used Avail Use% Mounted on

/dev/sda3        26G  1.1G   25G   4% /

devtmpfs        908M     0  908M   0% /dev

tmpfs           914M     0  914M   0% /dev/shm

tmpfs           914M  8.6M  905M   1% /run

tmpfs           914M     0  914M   0% /sys/fs/cgroup

/dev/sda1       497M   91M  407M  19% /boot

tmpfs           183M     0  183M   0% /run/user/0

/dev/sdb        9.8G   37M  9.2G   1% /mnt

[root@localhost mnt]# cp /etc/passwd passwd

[root@localhost mnt]# ls -l

total 20

drwx------. 2 root root 16384 Aug  3 11:31 lost+found

-rw-r--r--. 1 root root  1015 Aug  3 11:34 passwd

[root@localhost mnt]# rm -rf passwd

```

 

 

- 确保误删除的文件内容被覆盖

 

# 方法:

- 卸载需要恢复文件的分区,或以只读形式挂载

 

 

```

[root@localhost mnt]# cd

[root@localhost ~]# umount /mnt/

[root@localhost ~]# df -h

Filesystem      Size  Used Avail Use% Mounted on

/dev/sda3        26G  1.1G   25G   4% /

devtmpfs        908M     0  908M   0% /dev

tmpfs           914M     0  914M   0% /dev/shm

tmpfs           914M  8.6M  905M   1% /run

tmpfs           914M     0  914M   0% /sys/fs/cgroup

/dev/sda1       497M   91M  407M  19% /boot

tmpfs           183M     0  183M   0% /run/user/0

 

 

```

 

# 安装extundelete

 

```

[root@localhost ~]# cd /usr/local/src/

[root@localhost src]# ls

[root@localhost src]# wget http://pkgs.fedoraproject.org/repo/pkgs/extundelete/extundelete-0.2.4.tar.bz2/77e626ad31433680c0a222069295d2ca/extundelete-0.2.4.tar.bz2

--2018-08-03 11:44:11--  http://pkgs.fedoraproject.org/repo/pkgs/extundelete/extundelete-0.2.4.tar.bz2/77e626ad31433680c0a222069295d2ca/extundelete-0.2.4.tar.bz2

Resolving pkgs.fedoraproject.org (pkgs.fedoraproject.org)... 209.132.181.4

Connecting to pkgs.fedoraproject.org (pkgs.fedoraproject.org)|209.132.181.4|:80... connected.

HTTP request sent, awaiting response... 302 Found

Location: https://src.fedoraproject.org/repo/pkgs/extundelete/extundelete-0.2.4.tar.bz2/77e626ad31433680c0a222069295d2ca/extundelete-0.2.4.tar.bz2 [following]

--2018-08-03 11:44:12--  https://src.fedoraproject.org/repo/pkgs/extundelete/extundelete-0.2.4.tar.bz2/77e626ad31433680c0a222069295d2ca/extundelete-0.2.4.tar.bz2

Resolving src.fedoraproject.org (src.fedoraproject.org)... 209.132.181.15, 209.132.181.16

Connecting to src.fedoraproject.org (src.fedoraproject.org)|209.132.181.15|:443... connected.

HTTP request sent, awaiting response... 200 OK

Length: 108472 (106K) [application/x-bzip2]

Saving to: ‘extundelete-0.2.4.tar.bz2’

 

100%[================================================================================>] 108,472      152KB/s   in 0.7s   

 

2018-08-03 11:44:13 (152 KB/s) - ‘extundelete-0.2.4.tar.bz2’ saved [108472/108472]

 

[root@localhost src]# ls

extundelete-0.2.4.tar.bz2

 

[root@localhost src]# tar jxvf extundelete-0.2.4.tar.bz2

extundelete-0.2.4/

extundelete-0.2.4/acinclude.m4

extundelete-0.2.4/missing

extundelete-0.2.4/autogen.sh

extundelete-0.2.4/aclocal.m4

extundelete-0.2.4/configure

extundelete-0.2.4/LICENSE

extundelete-0.2.4/README

extundelete-0.2.4/install-sh

extundelete-0.2.4/config.h.in

extundelete-0.2.4/src/

extundelete-0.2.4/src/extundelete.cc

extundelete-0.2.4/src/block.h

extundelete-0.2.4/src/kernel-jbd.h

extundelete-0.2.4/src/insertionops.cc

extundelete-0.2.4/src/block.c

extundelete-0.2.4/src/cli.cc

extundelete-0.2.4/src/extundelete-priv.h

extundelete-0.2.4/src/extundelete.h

extundelete-0.2.4/src/jfs_compat.h

extundelete-0.2.4/src/Makefile.in

extundelete-0.2.4/src/Makefile.am

extundelete-0.2.4/configure.ac

extundelete-0.2.4/depcomp

extundelete-0.2.4/Makefile.in

extundelete-0.2.4/Makefile.am

```

 

```

[root@localhost extundelete-0.2.4]# ls

acinclude.m4  autogen.sh   configure     depcomp     LICENSE      Makefile.in  README

aclocal.m4    config.h.in  configure.ac  install-sh  Makefile.am  missing      src

[root@localhost extundelete-0.2.4]# ./configure

Configuring extundelete 0.2.4

Writing generated files to disk

 

[root@localhost extundelete-0.2.4]# make -j 2

make -s all-recursive

Making all in src

extundelete.cc: In function ‘ext2_ino_t find_inode(ext2_filsys, ext2_filsys, ext2_inode*, std::string, int)’:

extundelete.cc:1272:29: warning: narrowing conversion of ‘search_flags’ from ‘int’ to ‘ext2_ino_t {aka unsigned int}’ inside { } [-Wnarrowing]

    buf, match_name2, priv, 0};

                             ^

[root@localhost extundelete-0.2.4]# make install

Making install in src

  /usr/bin/install -c extundelete '/usr/local/bin'

```

 

```

[root@localhost extundelete-0.2.4]# cd /mnt/

[root@localhost mnt]# ls

 

```

```

[root@localhost mnt]# extundelete /dev/sdb --inode 2

NOTICE: Extended attributes are not restored.

Loading filesystem metadata ... 80 groups loaded.

Group: 0

Contents of inode 2:

0000 | ed 41 00 00 00 10 00 00 eb ce 63 5b 7e ce 63 5b | .A........c[~.c[

0010 | 7e ce 63 5b 00 00 00 00 00 00 03 00 08 00 00 00 | ~.c[............

0020 | 00 00 08 00 02 00 00 00 0a f3 01 00 04 00 00 00 | ................

0030 | 00 00 00 00 00 00 00 00 01 00 00 00 23 24 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 1c ba 88 51 1c ba 88 51 00 5b af 34 | .......Q...Q.[.4

0090 | 85 cc 63 5b 00 00 00 00 00 00 00 00 00 00 00 00 | ..c[............

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: 1533267691

Creation time: 1533267582

Modification time: 1533267582

Deletion Time: 0

Low 16 bits of Group Id: 0

Links count: 3

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, 9251, 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

passwd                                            12             Deleted

 

```

 

> 根据指定inode或者文件类型进行恢复

 

```

[root@localhost mnt]# extundelete /dev/sdb --restore-all

NOTICE: Extended attributes are not restored.

Loading filesystem metadata ... 80 groups loaded.

Loading journal descriptors ... 174 descriptors loaded.

*** Error in `extundelete': double free or corruption (!prev): 0x000000000210afc0 ***

======= Backtrace: =========

/lib64/libc.so.6(+0x81499)[0x7fcbfba9b499]

extundelete[0x40ce9b]

extundelete[0x40ffb6]

extundelete[0x404684]

/lib64/libc.so.6(__libc_start_main+0xf5)[0x7fcbfba3c445]

extundelete[0x404bbf]

======= Memory map: ========

00400000-0041c000 r-xp 00000000 08:03 100685901                          /usr/local/bin/extundelete

0061c000-0061d000 r--p 0001c000 08:03 100685901                          /usr/local/bin/extundelete

0061d000-0061e000 rw-p 0001d000 08:03 100685901                          /usr/local/bin/extundelete

0061e000-0061f000 rw-p 00000000 00:00 0

020ec000-0212e000 rw-p 00000000 00:00 0                                  [heap]

7fcbf4000000-7fcbf4021000 rw-p 00000000 00:00 0

7fcbf4021000-7fcbf8000000 ---p 00000000 00:00 0

7fcbfb7fe000-7fcbfb815000 r-xp 00000000 08:03 68260903                   /usr/lib64/libpthread-2.17.so

7fcbfb815000-7fcbfba14000 ---p 00017000 08:03 68260903                   /usr/lib64/libpthread-2.17.so

7fcbfba14000-7fcbfba15000 r--p 00016000 08:03 68260903                   /usr/lib64/libpthread-2.17.so

7fcbfba15000-7fcbfba16000 rw-p 00017000 08:03 68260903                   /usr/lib64/libpthread-2.17.so

7fcbfba16000-7fcbfba1a000 rw-p 00000000 00:00 0

7fcbfba1a000-7fcbfbbdd000 r-xp 00000000 08:03 67163136                   /usr/lib64/libc-2.17.so

7fcbfbbdd000-7fcbfbddc000 ---p 001c3000 08:03 67163136                   /usr/lib64/libc-2.17.so

7fcbfbddc000-7fcbfbde0000 r--p 001c2000 08:03 67163136                   /usr/lib64/libc-2.17.so

7fcbfbde0000-7fcbfbde2000 rw-p 001c6000 08:03 67163136                   /usr/lib64/libc-2.17.so

7fcbfbde2000-7fcbfbde7000 rw-p 00000000 00:00 0

7fcbfbde7000-7fcbfbdfc000 r-xp 00000000 08:03 67720242                   /usr/lib64/libgcc_s-4.8.5-20150702.so.1

7fcbfbdfc000-7fcbfbffb000 ---p 00015000 08:03 67720242                   /usr/lib64/libgcc_s-4.8.5-20150702.so.1

7fcbfbffb000-7fcbfbffc000 r--p 00014000 08:03 67720242                   /usr/lib64/libgcc_s-4.8.5-20150702.so.1

7fcbfbffc000-7fcbfbffd000 rw-p 00015000 08:03 67720242                   /usr/lib64/libgcc_s-4.8.5-20150702.so.1

7fcbfbffd000-7fcbfc0fe000 r-xp 00000000 08:03 67733119                   /usr/lib64/libm-2.17.so

7fcbfc0fe000-7fcbfc2fd000 ---p 00101000 08:03 67733119                   /usr/lib64/libm-2.17.so

7fcbfc2fd000-7fcbfc2fe000 r--p 00100000 08:03 67733119                   /usr/lib64/libm-2.17.so

7fcbfc2fe000-7fcbfc2ff000 rw-p 00101000 08:03 67733119                   /usr/lib64/libm-2.17.so

7fcbfc2ff000-7fcbfc3e8000 r-xp 00000000 08:03 67258580                   /usr/lib64/libstdc++.so.6.0.19

7fcbfc3e8000-7fcbfc5e7000 ---p 000e9000 08:03 67258580                   /usr/lib64/libstdc++.so.6.0.19

7fcbfc5e7000-7fcbfc5ef000 r--p 000e8000 08:03 67258580                   /usr/lib64/libstdc++.so.6.0.19

7fcbfc5ef000-7fcbfc5f1000 rw-p 000f0000 08:03 67258580                   /usr/lib64/libstdc++.so.6.0.19

7fcbfc5f1000-7fcbfc606000 rw-p 00000000 00:00 0

7fcbfc606000-7fcbfc648000 r-xp 00000000 08:03 67263425                   /usr/lib64/libext2fs.so.2.4

7fcbfc648000-7fcbfc848000 ---p 00042000 08:03 67263425                   /usr/lib64/libext2fs.so.2.4

7fcbfc848000-7fcbfc849000 r--p 00042000 08:03 67263425                   /usr/lib64/libext2fs.so.2.4

7fcbfc849000-7fcbfc84b000 rw-p 00043000 08:03 67263425                   /usr/lib64/libext2fs.so.2.4

7fcbfc84b000-7fcbfc84e000 r-xp 00000000 08:03 67909932                   /usr/lib64/libcom_err.so.2.1

7fcbfc84e000-7fcbfca4d000 ---p 00003000 08:03 67909932                   /usr/lib64/libcom_err.so.2.1

7fcbfca4d000-7fcbfca4e000 r--p 00002000 08:03 67909932                   /usr/lib64/libcom_err.so.2.1

7fcbfca4e000-7fcbfca4f000 rw-p 00003000 08:03 67909932                   /usr/lib64/libcom_err.so.2.1

7fcbfca4f000-7fcbfca71000 r-xp 00000000 08:03 67163128                   /usr/lib64/ld-2.17.so

7fcbfcbd1000-7fcbfcc69000 rw-p 00000000 00:00 0

7fcbfcc6d000-7fcbfcc70000 rw-p 00000000 00:00 0

7fcbfcc70000-7fcbfcc71000 r--p 00021000 08:03 67163128                   /usr/lib64/ld-2.17.so

7fcbfcc71000-7fcbfcc72000 rw-p 00022000 08:03 67163128                   /usr/lib64/ld-2.17.so

7fcbfcc72000-7fcbfcc73000 rw-p 00000000 00:00 0

7fff13bb3000-7fff13bd4000 rw-p 00000000 00:00 0                          [stack]

7fff13bfe000-7fff13c00000 r-xp 00000000 00:00 0                          [vdso]

ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]

Aborted

 

```