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EXT3GREP(8) recover files on ext3 filesystems EXT3GREP(8)
NAME
ext3grep - ext3 file recovery tool
SYNOPSIS
ext3grep [OPTIONS] FILE ...
DESCRIPTION
ext3grep is a simple tool intended to aid anyone who accidentally deletes a file on an ext3 filesystem, only to find that they wanted it
shortly thereafter.
OPTIONS
--superblock
Print contents of superblock in addition to the rest. If no action is specified then this option is implied.
--print
Print contents of block or inode, if any.
--ls
Print directories, one line per entry. See the FILTERS section for details on filtering this output.
--accept FILE
Accepts 'file' as a legal filename. Can be used multiple times. If you change any --accept you must remove BOTH stage* files!
--journal
Prints the contents of the journal.
--show-path-inodes
Show the inode of each directory component in paths.
Filters:
--group gid
Only show/process files owned by process group gid.
--directory
Only show/process process directory inodes.
--after dtime
Only show/process entries deleted on or after dtime.
--before dtime
Only show/process 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 allo-
cated, 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 inode_num
Print the block that contains inode inode_num.
--inode inode_num
Show info on inode inode_num. 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 block_num
Show info on block block_num. 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 block_num
Show info on journal block block_num.
--journal-transaction seq
Show info on transaction with sequence number seq.
--dump-names
Write the paths of files to stdout. This implies --ls but suppresses its 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 block_num
Find inodes that refer to block block_num.
--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 inode_num
Show copies of inode inode_num still in the journal.
--restore-file path
Will restore file path. path is relative to 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 ./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 pollute the output.
--show-hardlinks
Show all inodes that are shared by two or more files.
--version, -[vV]
Prints the version information and exits.
--help,
Prints a help message and exits.
EXAMPLES
Restoring all files from the ext3 partition/file /backup/sda1:
ext3grep --restore-all /backup/sda1
Listing the files owned by GID 1000 on /backup/sda1:
ext3grep --ls --group 1000 /backup/sda1
Finding all files containing the string Critical_report in their name on /backup/sda1:
ext3grep --dump-names /backup/sda1 | grep 'Critical_report'
LIMITATIONS
Do not attempt to use ext3grep for recovery from a mounted filesystem. Ever.
No, not even then.
ext3grep sometimes runs out of memory spare on 32-bit architectures and crashes. It is highly recommended that you run ext3grep in a 64-bit
environment when dealing with large filesystems, though this is seen as a bug.
ext3grep cannot recover files if there are no remnants of them.
Some files that ext3grep recovers may have trailing null bytes - just scrape them off like the burnt bits on toast.
SEE ALSO
debugfs(8)
AUTHOR
ext3grep was written by Carlo Wood <carlo@alinoe.com>.
This manual page was written by Rich Ercolani <rercola@acm.jhu.edu>, for the Debian project (but may be used by others). It may be distrib-
uted under the same terms as ext3grep, the GNU General Public License, either version 2 or (at your option) any later version.
0.8.0 2008-09-14 EXT3GREP(8)