EXT3文件系统中误删文件的恢复方法

之前的文章中说明了当用rm -rf误删除文件后的恢复方法，使用这种方法是有前提条件的，必须保证Oracle实例没有关闭，Oracle的相关

之前的文章中说明了当用rm -rf误删除文件后的恢复方法，使用这种方法是有前提条件的，必须保证Oracle实例没有关闭，Oracle的相关进程还在运行。而当Oracle进程已经关闭后，就无法再通过利用ora_进程跟踪文件句柄进行恢复了，那么还有办法对误删除的文件进行恢复吗?

rm-rf 误操作的恢复过程

Linux EXT3文件系统下成功恢复误删的文件

下面介绍一种用第三方软件进行恢复的方法：

--首先确保已经安装了e2fsprogs包
[root@ora10g ext3grep-0.10.2]# rpm -qa | grep e2fsprogs
e2fsprogs-1.39-20.el5
e2fsprogs-devel-1.39-20.el5
e2fsprogs-libs-1.39-20.el5

--软件下载：

--用Xshell复制到/opt目录后解压并编译安装

[root@ora10g ~]# cd /opt/

[root@ora10g opt]# tar -zxvf ext3grep-0.10.2.tar.gz

[root@ora10g opt]# ll
total 500
drwxr-xr-x 3 1000 1000 4096 Aug 26 09:09 ext3grep-0.10.2
-rw-r--r-- 1 root root 236364 Aug 26 09:08 ext3grep-0.10.2.tar.gz
drwxr-xr-x 3 root root 4096 Aug 22 16:44 ORCLfmap
drwxrwxr-x 8 oracle oinstall 4096 Aug 25 11:39 rlwrap-0.37
-rw-r--r-- 1 root root 251438 Aug 25 11:37 rlwrap-0.37.tar.gz
[root@ora10g opt]# cd ext3grep-0.10.2
[root@ora10g ext3grep-0.10.2]# ./configure&&make&&make install
编译过程略……

--查看软件命令使用方法
[root@ora10g ext3grep-0.10.2]# ext3grep --help
Running ext3grep version 0.10.2
Usage: ext3grep [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.
--print Print content of block or inode, if any.
--ls Print directories with only one line per entry.
This option is often needed to turn on filtering.
--accept filen Accept 'filen' as a legal filename. Can be used multi-
ple times. If you change any --accept you must remove
BOTH stage* files!
--accept-all Simply accept everything as filename.
--journal Show content of journal.
--show-path-inodes Show the inode of each directory component in paths.
Filters:
--group grp Only process group 'grp'.
--directory Only process directory inodes.
--after dtime Only entries deleted on or after 'dtime'.
--before dtime Only entries deleted before 'dtime'.
--deleted Only show/process deleted entries.
--allocated Only show/process allocated inodes/blocks.
--unallocated Only show/process unallocated inodes/blocks.
--reallocated Do not suppress entries with reallocated inodes.
Inodes are considered 'reallocated' if the entry
is deleted but the inode is allocated, but also when
the file type in the dir entry and the inode are
different.
--zeroed-inodes Do not suppress entries with zeroed inodes. Linked
entries are always shown, regardless of this option.
--depth depth Process directories recursively up till a depth
of 'depth'.
Actions:
--inode-to-block ino Print the block that contains inode 'ino'.
--inode ino Show info on inode 'ino'.
If --ls is used and the inode is a directory, then
the filters apply to the entries of the directory.
If you do not use --ls then --print is implied.
--block blk Show info on block 'blk'.
If --ls is used and the block is the first block
of a directory, then the filters apply to entries
of the directory.
If you do not use --ls then --print is implied.
--histogram=[atime|ctime|mtime|dtime|group]
Generate a histogram based on the given specs.
Using atime, ctime or mtime will change the
meaning of --after and --before to those times.
--journal-block jblk Show info on journal block 'jblk'.
--journal-transaction seq
Show info on transaction with sequence number 'seq'.
--dump-names Write the path of files to stdout.
This implies --ls but suppresses it's output.
--search-start str Find blocks that start with the fixed string 'str'.
--search str Find blocks that contain the fixed string 'str'.
--search-inode blk Find inodes that refer to block 'blk'.
--search-zeroed-inodes Return allocated inode table entries that are zeroed.
--inode-dirblock-table dir
Print a table for directory path 'dir' of directory
block numbers found and the inodes used for each file.
--show-journal-inodes ino
Show copies of inode 'ino' still in the journal.
--restore-inode ino[@seqnr][,ino[@seqnr],...]
Restore the file(s) with known inode number 'ino'.
The restored files are created in ./RESTORED_FILES/
with their inode number as extension (ie, inode.12345).
If '@seqnr' is provided then (only) the journal entry
with that sequence number is used, otherwise the latest
entry is used (if any). You can use that in the case a
a file was overwritten or truncated, rather than deleted.
--restore-file 'path' [--restore-file 'path' ...]
Will restore file 'path'. 'path' is relative to the
root of the partition and does not start with a '/' (it
must be one of the paths returned by --dump-names).
The restored directory, file or symbolic link is
created in the current directory as 'RESTORED_FILES/path'.
--restore-all As --restore-file but attempts to restore everything.
The use of --after is highly recommended because the
attempt to restore very old files will only result in
them being hard linked to a more recently deleted file
and as such polute the output.
--show-hardlinks Show all inodes that are shared by two or more files.