rkhunter: right way to handle warnings further?

Posted by zuba on Ask Ubuntu See other posts from Ask Ubuntu or by zuba
Published on 2013-02-14T09:18:00Z Indexed on 2013/11/05 4:14 UTC
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rkhunter

I googled some and checked out two first links it found:

They don't mention what shall I do in case of such warnings:

Warning: The command '/bin/which' has been replaced by a script: /bin/which: POSIX shell script text executable
Warning: The command '/usr/sbin/adduser' has been replaced by a script: /usr/sbin/adduser: a /usr/bin/perl script text executable
Warning: The command '/usr/bin/ldd' has been replaced by a script: /usr/bin/ldd: Bourne-Again shell script text executable
Warning: The file properties have changed:
         File: /usr/bin/lynx
         Current hash: 95e81c36428c9d955e8915a7b551b1ffed2c3f28
         Stored hash : a46af7e4154a96d926a0f32790181eabf02c60a4

Q1: Is there more extended HowTos which explain how to deal with different kind warnings?

And the second question. Were my actions sufficient to resolve these warnings?

a) To find the package which contains the suspicious file, e.g. it is debianutils for the file /bin/which

~ > dpkg -S /bin/which
debianutils: /bin/which

b) To check the debianutils package checksums:

~ > debsums debianutils
/bin/run-parts                                                                OK
/bin/tempfile                                                                 OK
/bin/which                                                                    OK
/sbin/installkernel                                                           OK
/usr/bin/savelog                                                              OK
/usr/sbin/add-shell                                                           OK
/usr/sbin/remove-shell                                                        OK
/usr/share/man/man1/which.1.gz                                                OK
/usr/share/man/man1/tempfile.1.gz                                             OK
/usr/share/man/man8/savelog.8.gz                                              OK
/usr/share/man/man8/add-shell.8.gz                                            OK
/usr/share/man/man8/remove-shell.8.gz                                         OK
/usr/share/man/man8/run-parts.8.gz                                            OK
/usr/share/man/man8/installkernel.8.gz                                        OK
/usr/share/man/fr/man1/which.1.gz                                             OK
/usr/share/man/fr/man1/tempfile.1.gz                                          OK
/usr/share/man/fr/man8/remove-shell.8.gz                                      OK
/usr/share/man/fr/man8/run-parts.8.gz                                         OK
/usr/share/man/fr/man8/savelog.8.gz                                           OK
/usr/share/man/fr/man8/add-shell.8.gz                                         OK
/usr/share/man/fr/man8/installkernel.8.gz                                     OK
/usr/share/doc/debianutils/copyright                                          OK
/usr/share/doc/debianutils/changelog.gz                                       OK
/usr/share/doc/debianutils/README.shells.gz                                   OK
/usr/share/debianutils/shells                                                 OK

c) To relax about /bin/which as I see OK

/bin/which                                                                    OK

d) To put the file /bin/which to /etc/rkhunter.conf as SCRIPTWHITELIST="/bin/which"

e) For warnings as for the file /usr/bin/lynx I update checksum with rkhunter --propupd /usr/bin/lynx.cur

Q2: Do I resolve such warnings right way?

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