Free recovers data from software for linux

The gzip Recovery Toolkit attempts to automate the recovery of data from corrupted gzip files (including tarballs) through a program called gzrecover. gzip Recovery Toolkit package is still very experimental at this point.
99% of "corrupted" gzip archives are caused by transferring the file via FTP in ASCII mode instead of binary mode. Please re-transfer the file in the correct mode first before attempting to recover from a file you believe is corrupted.
This program is provided AS IS with absolutely NO WARRANTY. It is not guaranteed to recover anything from your file, nor is what it does recover guaranteed to be good data. The bigger your file, the more likely that something will be extracted from it. Also keep in mind that this program gets faked out and is likely to "recover" some bad data. Everything should be manually verified.
Usage:
Run gzrecover on a corrupted .gz file. Anything that can be read from the file will be written to a file with the same name, but with a .recovered appended (any .gz is stripped). You can override this with the -o option.
To get a verbose readout of exactly where gzrecover is finding bad bytes, use the -v option to enable verbose mode. This will probably overflow your screen with text so best to redirect output to a file.
Once gzrecover has finished, you will need to manually verify any data recovered as it is quite likely that our output file is corrupt and has some garbage data in it. If your archive is a tarball, read on.
For tarballs, the tar program will choke because GNU tar cannot handle errors in the file format. Fortunately, GNU cpio (tested at version 2.5 or higher) handles corrupted files out of the box.
Heres an example:
$ ls *.gz
my-corrupted-backup.tar.gz
$ gzrecover my-corrupted-backup.tar.gz
$ ls *.recovered
my-corrupted-backup.tar.recovered
$ cpio -F my-corrupted-backup.tar.recovered -i -v
If you have a previous release, please note that the patches to GNU tar have been discontinued. They were only marginally successful at best and GNU cpio does what is needed out of the box and does it far better.
Enhancements:
- Documentation updates, including a man page, plus code cleanup to better enable inclusion in GNU/Linux packages and eliminate compilation warnings.

PhotoRec is a small tool to recover pictures from digital camera memory. Photorec software searches for MOV and JPEG headers, and because there is (usually) no data fragmentation, it can recover the whole file.
It can recover data from CompactFlash, Memory Stick, SecureDigital, SmartMedia, Microdrive, MMC, USB Memory Drives...
PhotoRec is safe to use, it will never attempt to write to the drive or memory support you are about to recover from. Recovered files are instead written in the directory from where you are running the PhotoRec program.
Photorec ignores the filesystem, this way it works even if the filesystem is severely damaged.
It can recover lost files at least from:
- FAT,
- NTFS,
- EXT2/EXT3 filesystem
Digital Camera
PhotoRec has been successfully tested with:
- Canon EOS300D, 10D
- HP PhotoSmart 620, 850, 935
- Nikon CoolPix 775, 5700
- Olympus C350N, C860L, Mju 400 Digital, Stylus 300
- Sony DSC-P9
- Praktica DCZ-3.4
- Casio Exilim EX-Z 750
PhotoRec searchs known file header and because there is no data fragmentation (usually), it can recover the whole file. Photorec recognises numerous file format including:
Archive
- .7z 7zip archive file
- .bz2 bzip2 compressed data
- .gz gzip compressed data
- .rar Rar archive
- .tar tar archive
- .zip zip archive
- Multimedia
- .asf, .wma, .wmv: Advanced Streaming Format used for Audio/Video
- .au Sun/NeXT audio data
- .avi .wav RIFF audio/video
- .bmp BMP bitmap image
- .cdr Corel Draw
- .crw Canon Raw picture
- .ctg Canon catalog
- .dcr Kodak Raw picture
- .dsc Nikon dsc
- .fla Flash Project File
- .gif Graphic Interchange Format
- .jng JPEG Network Graphics
- .jpg JPG picture
- .mng Multiple-Image Network Graphics
- .mov MOV video
- .mp3 MPEG ADTS, layer III, v1 audio
- .mp4 MPEG 4
- .mpg Moving Picture Experts Group video
- .mrw Minolta Raw picture
- .ogg OGG Vorbis audio
- .orf Olympus Raw Format picture
- .pcx PCX file format
- .pef Pentax Raw picture
- .png Portable Network Graphics
- .psd Adobe Photoshop Image
- .qxd QuarkXpress Document
- .qxp QuarkXpress Document
- .raf Raw Fujifilm picture
- .raw Contax picture
- .rdc Rollei picture
- .sit Mikron
- .sr2 Sony Raw picture
- .tif Tag Image File Format
- .x3f Sigma/Foveon X3 raw picture
- .xcf GIMP XCF File
Office
- .doc Microsoft Word
- .mbd Access database
- .odd OpenDocument Drawing
- .odp OpenDocument Presentation
- .ods OpenDocument Spreadsheet
- .odt OpenDocument Text
- .pap Papyrus word file
- .ppt PowerPoint presentation
- .rtf Rich Text Format
- .sda StarDraw
- .sdc StarCalc
- .sdd StarImpress
- .sdw StarWriter
- .slk Sylk, Multiplan Symbolic Link Interchange
- .sxc OpenOffice Spreadsheet
- .sxd OpenOffice Drawing
- .sxi OpenOffice Presentation
- .sxw OpenOffice Text Document
- .txt Text file
- .vis Visio document
- .xls Microsoft Excel
Others
- .asp ASP script
- .bat Batch
- .c C source file
- .dbf DBase 3 (prone to false positive)
- .dbx Outlook Express
- .eps Encasulated PostScript
- .exe MS executable
- .frm MySQL table definition
- .h C header
- .html HTML
- .jsp JSP script
- .MYI MySQL MISAM compressed data
- .pdf Portable Document Format
- .php PHP script
- .pl Perl script
- .prc PalmOS application
- .ps PostScript document
- .pst Outlook
- .py Python script
- .qdf Quicken
- .sh Shell script
- .wab Windows Address Book
Enhancements:
- A new method for handling fragmented data is now used, making recovery more reliable and faster.
- This release can be set to search for files in FAT16/FAT32 unallocated space only, which avoids wasting time recovering files that are still accessible, making the recovery of lost files much faster and more efficient.
- New file formats have been added.

Trinity Rescue Kit or TRK is a 100% free CD bootable Linux distribution aimed specifically at offline operations for Windows and Linux systems such as rescue, repair, password resets and cloning, with the ability to update itself.
It has custom tools to easily recover data such as deleted files, clone Windows installations over the network, perform antivirus sweeps with 2 different antivirus products, reset windows passwords, read AND write on NTFS partitions, edit
partition layout and much much more.
Trinity Rescue Kit 3.1 is the evolved version of 3.0 and a complete rewrite of version 1.1 and the unfinished 2.0. It s mostly based on Mandrake 10.2 (Mandriva 2005) binaries and heavily adapted startup scripts.
What s new since 3.0?
- self update capability: TRK now has a script that will download/search all non-GPL
licensed software, like the Microsoft ntfs
drivers or F-prot. It will also update antivirus definitions for F-prot and Clamav.
Afterwards, it will recreate itself as a new iso
file which you can burn again to CD
- new version of captive-ntfs, using the latest XP SP2 drivers and LUFS
- clamav 0.88-1
- mkisofs, cdrecord, pico, cfdisk
- eject CD (was bug in build 204) and powerdown on halt
What s new since 1.1 (and 2.0):
- more hardware support:
kernel 2.6.14.3 with most default options left on, so all important hardware like
disc controllers and network cards are supported, even SATA disks, USB storage and gigabit ethernet. Also patched with lufs (for ntfs support) and bootsplash (background graphics)
- better network capability: besides all common network client tools, you can also run a secure shell server for remote access or TRK to TRK file copies
- run completely from memory: provided you have at least 192Mb of ram, you can run TRK from memory and eject the CD once it has booted, giving you the ability to mount other CDs
- vesa framebuffer support: TRK now has limited graphical support thanks to kernel
builtin framebuffer support.
- qtparted: the famous PQMagic clone. Partition editing never been this easy thanks to the graphical interface this tool uses (via framebuffer)
- configure your LAN to be "TRK 3 compliant": you can change the way a TRK behaves by adding an otherwise unused parameter to your DHCP server to point to a webserver where you keep specific configuration data for your TRK such as proxy settings or complete scripts with which you can do anything you want
- run scripts from a local computer by searching for /.trk/trklocal.conf
- full NTFS write support thanks to the captive ntfs project by Jan Kratochvil.
- more NTFS write support with the NTFS Fuse driver.
- Secure Shell server: let a user boot from TRK, enter a new password for root and
connect to TRK remotely
Featuring home brewed scripts, new and improved:
- updatetrk (since 3.1): updates TRK with ntfs drivers, F-prot + definitions and
Clamav definitions. When the script is run without arguments, it looks for a Windows pagefile.sys, creates a loopback filesystem on it and creates TRK from there. Afterwards it copies the new isofile to C: emp, from where you can burn it to CD again
- clonexp: script that uses ntfsclone to perform copies of ntfs filesystems between
two computers each running their copy of Trinity Rescue Kit 3.1. One PC copies his Windows installation over the network to another PC running a TRK 3.1 with a secure shell server enabled. An easy way to clone Windows installations or recover as much as you can from a dying disk. Run it either interactively or from a single commandline
- winpass: does the same thing as in TRK 1.1, searches for all local Windows
installations, runs chntpw on your SAM file and resets the password. It now also handles Windows on FAT32 correctly and uses the safe ntfs driver from the Linux kernel, so it works even without captive support
- regedit: is actually the same as winpass, but starts chntpw in interactive mode and allows you to edit a Windows registry
- virusscan: completely rewritten,this script now has two different engines: the default is to run with the GNU Clamav antivirus which is free for everyone. This is a very good scanner, but the drawback is that it can only detect virus infected files, not clean them. So the only option is to delete them, where most of the time the file is the complete virus. But just to be sure we don t delete anything valuable, a quarantined backup is being made first. The other part of the script uses the free-for-home-users F-prot. F-prot itself is not included in TRK but it gets downloaded from their site. F-prot DOES have the ability to disinfect files if necessary.
- ntfsundeleteall: also completely rewritten, ntfsundeleteall, a wrapper for
ntfsundelete now recovers deleted files from an NTFS volume but it gives you the ability to add a recoverability percentage to the commandline. Since it only recovers files and not directories, sometimes you would have double filenames. This has been countered by adding the inode of the file at the beginning of the filename, so recoverability is 100% within the possibilities of ntfsundelete
More utils:
- links: simple webbrowser which runs in framebuffer graphical mode. Handy to go and read some reference docs on the Internet
- ftp and lftp
- ssh and scp
- ms-sys: This program is used to create Microsoft compatible boot records. It is able to do the same as Microsoft "fdisk /mbr" to a hard disk. It is also able to do the same as Microsoft "sys d:" to a floppy or FAT partition except that it does not copy any system files, only the boot record is written.
- Reiserfs tools
- ext2/ext3 tools
- ntfsprogs
- dosfs tools
- tcpdump, nmap and netcat
- mdadm for offline raid configuration
- burn, a utility that stresses your CPU
- samba client: mount windows shares over the network
- shred: erase a harddisk until its unrecoverable even by magnetic resonance recovery
- fatback: undelete files from fat filesystems
- TestDisk: Tool to check and undelete partition, works with most common partitions
- PhotoRec: File and pictures recovery. PhotoRec has been created to recover pictures from digital camera memory and it has been extended to recover lost files from harddisk (List of known files). PhotoRec is safe to use, it will never attempt to write to the drive or memory support you are about to recover from. Recovered files are instead written in the directory from where you are running the PhotoRec program.
- pico text editor
- mkisofs and cdrecord
- perl 5
Enhancements:
- Very extensive and complete documentation.
- 2 more virus scan engines: Grisoft AVG and BitDefender.
- ntfs-3g has full and fast read/write support for NTFS drives.
- Bootable from a USB stick and over PXE.
- An integrated Samba file server.
- LVM support.
- Kernel 2.6.19.2 and hwdata 0.191-1.
- Menu-based graphical startup.
- Tools to migrate TRK from CD to USB and back to an ISO file if desired.
- Bridging capabilities.
- Full proxy server support: a script called "setproxy" can prompt you for your networks proxy parameters, allowing you to access the internet and update your TRK.

The following is an excerpt from a poster presented at the American Astronomical Societys 2000 Summer meeting in Rochester, NY.

ADS roughly 1,000,000 scanned pages contain numerous diagrams and figures for which the original data sets are lost or inaccessible. Having scans for the figures invites digitizing the data points to recover at least a part of these data.

Performing this digitization automatically is still beyond the capabilities of current OCR systems, but the computer can ease this process for a human.

This was the starting point for Dexter, a Java applet that runs in the users browsers and provides an interface for selecting the part of the page that is of interest. On that selection, coordinate axes, points and error bars can be marked and, of course, corrected. [...]

In the future, we plan to implement some recognition algorithms that would, e.g., trace a line for the user or automatically search for markers.

Data::SimplePassword provides a simple random password generator.

SYNOPSIS

use Data::SimplePassword;

my $sp = Data::SimplePassword->new;
$sp->chars( 0..9, a..z, A..Z ); # optional

my $password = $sp->make_password( 8 ); # length

Its a very easy-to-use but a bit strong random password generator.

XML::LibXML::Parser is a Perl module to parse XML Data with XML::LibXML.

SYNOPSIS

$parser = XML::LibXML->new();
$doc = $parser->parse_file( $xmlfilename );
$doc = $parser->parse_fh( $io_fh );
$doc = $parser->parse_string( $xmlstring);
$doc = $parser->parse_html_file( $htmlfile, %opts );
$doc = $parser->parse_html_fh( $io_fh, %opts );
$doc = $parser->parse_html_string( $htmlstring, %opts );
$fragment = $parser->parse_balanced_chunk( $wbxmlstring );
$fragment = $parser->parse_xml_chunk( $wbxmlstring );
$parser->process_xincludes( $doc );
$parser->processXIncludes( $doc );
$parser->parse_chunk($string, $terminate);
$parser->start_push();
$parser->push(@data);
$doc = $parser->finish_push( $recover );
$parser->validation(1);
$parser->recover(1);
$parser->recover_silently(1);
$parser->expand_entities(0);
$parser->keep_blanks(0);
$parser->pedantic_parser(1);
$parser->line_numbers(1);
$parser->load_ext_dtd(1);
$parser->complete_attributes(1);
$parser->expand_xinclude(1);
$parser->load_catalog( $catalog_file );
$parser->base_uri( $your_base_uri );
$parser->gdome_dom(1);
$parser->clean_namespaces( 1 );
$parser->no_network(1);

SYNOPSIS

use XML::LibXML;
my $parser = XML::LibXML->new();

my $doc = $parser->parse_string(parse_fh( $xmlstream );

my $fragment = $parser->parse_xml_chunk( $xml_wb_chunk );

zfec is a fast, portable, and programmable implementation of erasure coding. The project includes a C library, a Python library, and a command-line tool.

Erasure coding is also known as "forward error correction", which is the generation of redundant blocks of information such that if some blocks are lost then the original data can be recovered from the remaining blocks. The RAID-5 algorithm is an erasure code.

But instead of recovering from the loss of only a single element, zfec can be parameterized to choose in advance the number of elements whose loss it can tolerate.