Are thes files usually scripts in Ubuntu?

[Ray Parrish]

Hello,

I was reading article from some of the magazines I get in email today 
and ran across one about Root Kit Hunter for Linus, so I decided to 
install and run it just to see what it said. It found no root kits, but 
did give me a warning on the following five files.

[13:17:33] /bin/which                                        [ Warning ]
[13:17:33] Warning: The command '/bin/which' has been replaced by a 
script: /bin/which: POSIX shell script text executable
[13:17:35] /usr/bin/groups                                   [ Warning ]
[13:17:35] Warning: The command '/usr/bin/groups' has been replaced by a 
script: /usr/bin/groups: POSIX shell script text executable
[13:17:36] /usr/bin/ldd                                      [ Warning ]
[13:17:36] Warning: The command '/usr/bin/ldd' has been replaced by a 
script: /usr/bin/ldd: Bourne-Again shell script text executable
[13:17:40] /usr/bin/lwp-request                              [ Warning ]
[13:17:41] Warning: The command '/usr/bin/lwp-request' has been replaced 
by a script: /usr/bin/lwp-request: perl script text executable
[13:17:43] /usr/sbin/adduser                                 [ Warning ]
[13:17:43] Warning: The command '/usr/sbin/adduser' has been replaced by 
a script: /usr/sbin/adduser: perl script text executable

Since this Root Kit Hunter isn't specifically designed for Ubuntu but 
claimed to be cross platform for all Linux machines I would like to know 
if it's normal for the preceding files to be scripts in Ubuntu Hardy 
Heron instead of binary files.

Thanks, Ray Parrish

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