SID is a Shell Intrusion Detection system. The kernel part plugs into a terminal-processing subsystem and logs hashed terminal lines. The user part reads log entries (hashes), consults a list of allowed entries, and takes appropriate action upon unexpected log entries. Currently supported are Solaris and Linux.
fd1710c9ac8bb6f2afc8701e8f4fea9c92f589266c690791b9b5ebd8ee580fcd