Tripwire is a security tool that checks the integrity of normal system binaries and reports any changes to syslog or by email. Tripwire is a good tool for ensuring that your binaries have not been replaced by Trojan horse programs. Trojan horses are malicious programs inadvertently installed because of identical filenames to distributed (expected) programs, and they can wreak havoc on a breached system.
There are two versions of Tripwire, an open-source version and a commercial product. The free version of Tripwire is available in the Ubuntu repositories. You can find out about the differences at www.tripwire.org.
To initialize Tripwire, use its
-init option, like this: