Sentinel is a fast file/drive scanning utility similar to the Tripwire and Viper.pl utilities available. It uses a database similar to Tripwire, but uses a RIPEMD-160bit MAC checksumming algorithm (no patents) which is more secure than the patented MD5 128 bit checksum. It should run on most unixes (tested on redhat linux v6.0 & v5.2, slackware linux v3.x & 4.xb and IRIX (v5.2 and v6.x). Several other utilities which are used for Sentinel development are also posted here. Most utilities are included with the sentinel tarball. The Sentinel Homepage is located at: http://zurk.sourceforge.net/zfile.html