SuperRescue is a single very large bootable system-on-a-disk. It's based on the observation that the vast majority of systems allow you to do so much more than the minimal system. Therefore, it isn't for everything, but for most desktop systems, it provides a much nicer rescue environment than your average rescue floppy. It requires an i386 PC with 24 MB of RAM and a bootable CD-ROM. PCMCIA support is implemented but somewhat limited. It is based on RedHat 7. (Version 1 is based on RedHat 6.)
SystemImager automates the installation of Linux to masses of similar machines. Software distribution, configuration, and operating system updates are made easy, including updates from one Linux release to another. It can also be used for content distribution on Web servers. It is most useful in environments with large numbers of identical machines. Some typical environments include Internet server farms, high performance clusters, computer labs, and corporate desktop environments where all workstations have the same basic hardware configuration.
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.