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　　Linux系统操作中，有时会不小心删除重要文件，而能够恢复删除文件的软件有很多，ext3grep就是其中的一种，ext3grep在使用中需要用到不少命令，下面小编就给大家介绍下Linux使用ext3grep的方法。

　　步骤：

　　目前的最新版本是：ext3grep-0.10.2.tar.gz

　　我系统的环境是：虚拟机

　　［root@localhost bin］# uname -a

　　Linux localhost.localdomain 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:54 EDT 2009 i686 i686 i386 GNU/Linux

　　［root@localhost bin］# cat /etc/issue

　　Red Hat Enterprise Linux Server release 5.4 （Tikanga）

　    安装很简单

　　tar zxvf ext3grep-0.10.2.tar.gz

　　cd ext3grep-0.10.2

　　。/configure --prefix=/usr/local/ext3grep

　　make

　　make install

　　顺利安装完成。

　　然后进入么安装目录看一下，只有一个bin

　　［root@localhost ext3grep］# pwd

　　/usr/local/ext3grep

　　［root@localhost ext3grep］# ls

　　bin

　　进到bin里面看一下

　　［root@localhost ext3grep］# cd bin

　　［root@localhost bin］# ls

　　ext3grep

　　我们可以看一下帮助，下面是部分

　　［root@localhost bin］# 。/ext3grep -h

　　Running ext3grep version 0.10.2

　　。/ext3grep： invalid option -- h

　　No action specified; implying --superblock.

　　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.

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