VDMFEC implements Block ECC using a Forward Error Correction (FEC) code based on Vandermonde (VDM) matrices in GF(2^8) due to Luigi Rizzo. Given the FEC parameters K and N, with N greater than K, N blocks are written for every K input blocks in such a way that any K blocks are sufficient to reconstruct the data. That is, up to N - K blocks out of every group of N blocks may be lost without loss of data. VDMFEC's primary application is intended to be in recovering data from unreliable media such as diskettes. With appropriate parameters, files may be recovered even with many read errors. (Note that you must write the data to the diskette using this program in order to be able to recover the data later!)
Channel16 is graphical tool that allows users to browse the content of deleted files in an ext2 filesystem interactively, and to recover them into new files. The application also provides a search and rescue operation. This allows the user to input some exact text from the deleted file, which the program uses to search through all deleted inodes. Channel16 uses the low-level methods provided by e2fsprogs. The front end is implemented with Java Swing, and Java Native Interface (JNI) is used to bridge between Java and the ext2fs operations.
e2undel is an interactive console tool that recovers the data of deleted files on an ext2 file system under Linux. A library that allows you to recover deleted files by name is included. e2undel does not manipulate any internal ext2 structures, and it does not require any additional tools. It should be useable without knowledge of the ext2 interna.
fsbackup is an incremental backup creation utility. It supports backup compression and encryption. Backups can be stored on the local file system, and a remote host (via SSH, or FTP). Some additional scripts allow backup SQL tables from PostgreSQL and MySQL, save system configuration files, and a list of installed packages. Backed-up files can be recovered, and system packages can be reinstalled.
The Linux Bootdisk HOWTO describes how to design and build boot/root diskettes for Linux on the Intel platform. These disks can be used as rescue disks or to test new system components. You should be reasonably familiar with system administration tasks before attempting to build a bootdisk.
FIRE, the Forensic and Incident Response Environment, (formerly known as Biatchux) is a portable, bootable CD-ROM-based distribution providing an immediate environment for performing forensics analysis, data recovery, virus scanning, and pen-testing. It also provides the necessary tools for live forensics/analysis/incident response.
chpox provides transparent checkpointing and restarting of processes on Linux clusters. It was originally designed for recovering tasks that have a long execution time (i.e. numerical simulations) in case of system crashes, power failures, etc. It may work with openMosix, is SMP safe, does not require program recompiling/relinking, and supports virtual memory, regular open files, pipes, Unix domain sockets, current directory, and child processes.