Dr. Rolf Freitags Projects

Priority notice

Most of the software i made was developed under Linux, but most of it, including the drivers,can be compiled and used with no or minor modifications under MS-Windows via Cygwin.with the Ioperm driver (package Devel/Ioperm, it has to be started via "ioperm -i") and the appended compiler option -lioperm.

dupmerge - A Program for securely finding and optional linking/deleting duplicate files here.

It is written in C, runs on various platforms (Win32/64 with Cygwin, Unix, Linux etc.) and you can also find it in the grml repository: http://deb.grml.org/pool/main/d/dupmerge/.
You can find a tutorial here.

The original dupmerge author, Phil Karn, has rewritten the original version from scratch, with a new algorithm: http://www.ka9q.net/code/dupmerge/.
So there are now, since december 2008, two actual v

ersions of dupmerge: The karn and the freitag version.

Similar programs are:

• clink
• dmergeduff
• dupfinder
• Duplicate Files Finder - Seems to be similar to dupmerge but with C++ source and a GUI
• Dupseek
• epac
• fdf - written in Perl/C and runs across most platforms (Win32, Unix and probably others).Uses MD5, SHA1 and other checksum algorithms
• fdfind
• fdupe
• fdupes
• finddup
• find_duplicates
• FindRepe - written in Java and a command-line tool designed for an eficient search of duplicate files (GNU/Linux, Mac OS X, Unix,Windows,
• freedup - written in POSIX C and runs across platforms (Windows with Cygwin, Linux, AIX, etc)
• freedups
• fslint - Has commandline interface and GUI
• ftwin
• highLnk
• libpuzzle
• liten - written in Python and has a command line tool and library, using md5 checksums and a novel byte comparison algorithm (Linux, Mac OS X, Unix, Windows),
• rdiff
• ua - a Unix/Linux command line tool, designed to work with find (and the like), like dupmerge,
• WeedIt
• whatpix

• Compiler-Tests0 - A minimal compiler test suit, espacially for mikrocontroller compiler
• randomize - An IPv4 number randomizer
• Public Key Steganography
• A driver for the cheap digital multimeter VC 840/VC 820
• A driver for the cheap digital LCR meter LCR 612
• A driver and powerbox for the cheap relay card 8fa for switching up to eight times 250 V AC / 5 A
• Frequency and impulse counter program which needs only the parallel port IRQ for frequencies up to 270 kHz.
  The program runs under Linux with the hard realtime patch RTAI.
• Some simple programs for the parallel port, e. g. a test to see if the data port is bidirectional and a simulator which simulates heartbeats and treads for an ergometer
• A driver for reading/writing data on MMC/SD cards with an MSP430 microcontroller
• A PCI template driver for linux with an interrupt handler for Kernel version
• A driver for the real time clock DS1339 and some driver stubs for the ARM9 platform
• Apache2 and proftpd server configuration files with bandwidth and connection limitation for a server with a DSL connection
• My Geiger counter page
• My PC battery charging page
• My Science Myths page