Description:

Tripwire is a file integrity checker - a utility that compares a
designated set of files and directories against information stored in
a previously generated database. Added or deleted files are flagged
and reported, as are any files that have changed from their previously
recorded state in the database. When run against system files on a
regular basis, any file changes would be spotted when Tripwire is next
run, giving system administrators information to enact damage control
measures immediately.