Samhain (stable branch) is a file system integrity checker that can be used as a client/server application for centralized monitoring of networked hosts. Databases and configuration files can be stored on the server. In addition to forwarding reports to the log server via authenticated TCP/IP connections, several other logging facilities (e-mail, console, tamper-resistant log file, and syslog) are available. Tested on Linux, AIX 4.1, HP-UX 10.20, Unixware 7.1.0, and Solaris 2.6.
You can download it from the following link: https://packetstormsecurity.com/files/download/25376/samhain-1.2.10.tar.gz
Source: https://packetstormsecurity.com/files/25376/Samhain-File-Integrity-Checker.html