Free recovers itself when 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.

recoverdm is a software that can recover files/disks with damaged sectors
This program will help you recover disks with bad sectors. You can recover files as well complete devices.
In case if finds sectors which simply cannot be recoverd, it writes an empty sector to the outputfile and continues. If youre recovering a CD or a DVD and the program cannot read the sector in "normal mode", then the program will try to read the sector in "RAW mode" (without error-checking etc.).
This toolkit also has a utility called mergebad: mergebad merges multiple images into one. This can be usefull when you have, for example, multiple CDs with the same data which are all damaged.
In such case, you can then first use recoverdm to retrieve the data from the damaged CDs into image-files and then combine them into one image with mergebad.
Usage:
recoverdm -t type -i file/devicein -o fileout [-l list] [-n retries] [-s speed]
-t type is 1 for files, 10 for floppy disks and 40 for IDE disks (try -h for a complete list)
-i file/devicein is the device or file you want to recover
-o fileout is the file where to write to. this file should not already exist!
-l list this file will contain the offsets(!) of the bad blocks as well as the size of the badblock. This file can be used together with the image with the mergebad utility.
-n retries number of retries before going on with next sector, defaults to 6
-r RAW read retries number of retries while reading in RAW mode before going on with next sector, defaults to 6
-s rotation speed rotation speed of CD-ROM/DVD, defaults to 1
-h gives the helptext
Enhancements:
- This release adds the ability to set the start-offset to read from the damaged media, a small performance optimization, and a fix for an infinite loop.

The mkCDrec utilities are optional for mkCDrec itself, but are an added value for rescue and recovery purposes.

The utilities are staticly compiled and include parted, memtest, partimage, gpart, and recover. Memtest86 is also available for memory testing.

To improve the added value of your recovery/rescue CD-ROM. You will notice that links from mkCDrec CD-ROM are foreseen to the /cdrom/utilities part of the CD-ROM and that man pages of these tools are already available within mkCDrec main toolset.

Without installing the utilities you cannot use them (obvious), but it will not break any other functionality of the mkCDrec tools. Therefore, a full restore remains possible (and disk cloning too), but you will not be able to resize a partition afterwards to name something.

Most of these utilities were compiled as static binaries, therefore, you can use those tools seperately too. If you know any tool which could useful to be included, please let me know... Since mkCDrec_utils_v0.5.7 you will notice that mkCDrec will use isolinux to boot from the CD-ROM instead of using syslinux floppy boot emulation.

But, this will only work if you use mkCDrec_v0.5.7 (or higher) as isolinux was first introduced in v0.5.7.

Parted

The famous Partition Editor of GNU software. The User Manual of parted is already part of mkCDrec.

Memtest

An excellent memory testing tool.

Partition Image

A tool to make/restore partition of msdos/vfat/ext2/reiserfs file systems. The primary purpose to include this tool is to allow a restore of old partition images made by this tool.

Gpart

Guess partition does what it implies. It can even recover destroyed partition tables, and therefore, maybe preventing a full restore. Useful in case if you do not make a mkcdrec on a regular basis.

Recover

An excellent tool to edit an EXT2 file system to recover lost files.

e2salvage

e2salvage is a utility which tries to recover a data from damaged ext2 partition. It may be used when e2fsck does not recover the broken ext2 filesystem. Before trying this tool read the man page (man e2salvage).

ext2resize

ext2resize, ext2prepare and ext2online are useful tools. ext2resize can increase (or decrease) the size of an unmounted ext2 filesystem. Be aware for ext2online one need a kernel patch (not likely installed). By the way, ext2resize does work too on an Ext3 filesystem! Be aware, one needs to apply S. Tweedies kernel patch (ext3) and an updated ext2 filesystem e2fprogs-1.20 or higher (which are ext3 aware). Last 2 requirements are of course only needed in case if you want to work with ext3 filesystems.

memtest86

Memtest86 is thorough, stand alone memory test for x86 architecture computers. BIOS based memory tests are only a quick check and often miss many of the failures that are detected by Memtest86.

chntpw

The offline NT password editor (chntpw) is a little program wich enables you to view and change passwords in a Windows NT SAM user database. For example,

Installation

# cd mkcdrec; tar zxvf mkCDrec_v0.7.9_utils.tar.gz
# ls -l utilities

trigger is a lightweight, asynchronous notification mechanism to set off events in and across systems. The poor mans daily snapshot, glastree builds live backup trees, with branches for each day. Users directly browse the past to recover older documents or retrieve lost files. Hard links serve to compress out unchanged files, while modified ones are copied verbatim. A prune utility effects a constant, sliding window.

DPCRTLMM (Daybo Logic C-RTL Memory Management) is an ANSI C memory management library, including callbacks, a debug log, leak reporting, and garbage collection. DPCRTLMM does incur performace penalties, however.
Main features:
- Ability to separate out blocks of memory into arrays, one array per module is nice
- Ability to recover the size of a block so one doesnt have to store it in the program
- Lockable blocks so that releasing them later will cause traps
- Common pointer mistakes such as releasing unowned memory are eliminated
- Memory leak reports
- Complete log of all usage
- Hooking of almost all operations so the program may preview activity
- Ability to determine if a pointer is invalid BEFORE it is used
- Unlimited number of hooks per event default=32 (requires rebuild)
- An unlimited (in theory) number of blocks can be allocated
- Unlimited block arrays (modules) per program, default=512 (requires rebuild)
- Information about every block allocated and its owner
- Fine/line tracing (C only)
- Garbage collection if library has traps disabled.

SafeRelay is a certificate authority center, based on OpenSSL, for network administrators who want to deploy certificates on a LAN (local area network). SafeRelay is written in CURSEL.

You may be thinking of using TLS/SSL and certificates on your LAN for activities like:

configuring intranet web servers to use HTTPS instead of plain HTTP
making LAN users connect over IMAP/SSL or POP3/SSL to your mailserver
letting your LAN users connect to your Sendmail SMTP server using certificate client authentication
having LAN users sign or encrypt their email with S/MIME
client authentication based on certificates for intranet HTTPS webservers

The basic idea is that users tend to forget to make a backup of their certificates.

If the PC of the user crashes, the private key and certificate, can be recovered, from the diskette, by the user without help or intervention from the system or network administrator.

If the user has multiple PCs (e.g. a laptop and desktop), it suffices to simply import the certificate from the diskette on both PCs.

If the diskette is lost by the user, or stolen by another user, or if the diskette suffers from a media error, a new diskette with a new keypair must be prepared for the user.

In any case, by giving the user a diskette with a certificate, the user immediately receives a backup. Any tangible medium would also work. In fact, SafeRelay could allow you to use "cdrecord" and a CD-RW drive instead. For important keys and certificates, you could copy the contents of the diskette onto a read-only medium such as a CD.