rkhunter 1.2.9-2 (i386 binary) in ubuntu feisty

 Rootkit Hunter scans your system for known and unknown rootkits,
 backdoors, sniffers and exploits.
 .
 Some of the tests it does:
   - MD5 hash compare
   - Look for default files used by rootkits
   - Wrong file permissions for binaries
   - Look for suspected strings in LKM and KLD modules
   - Look for hidden files
   - Optional scan within plaintext and binary files
 .
 Please note that rkhunter does *not* guarantee your system has
 not been compromised! You should also run additional tests, e.g. using
 chkrootkit and other measures.
 .
  Homepage: http://rkhunter.sourceforge.net