WatchFrog is a perl script and utility written for Unix systems. Its purpose is to detect checksum leap. Watchfrog uses chksum in -m mode (md5 checksum) and build a list of checksums versus file. The directory to be scanned may be configured using the /usr/local/etc/watchfrog.conf file. In the directories candidates for WatchFrog, any new addition of files, file removal or file modification will be reported by sending Email to a management account. WatchFrog is started at boot time. In addition, it will also report if its own daemon has been restarted in the machine life time. To install WatchFrog : % tar -xvf watchfrog.tar % ./WatchFrog -i and follow the instruction. Any problem and bugs should be reported to This software is also subject to the GNU GPL licensing. Please, see the license file in this directory for more information. THIS is the first public release of WatchFrog. It has been tested and successfuly used under Digital Unix for some time now and is a great help for us in detecting system's changes.