On Wednesday 14 June 2006 19:40, John Ziniti wrote: > William Hooper wrote: > > John Ziniti wrote: > >> I'm looking at some strange behavior on a _very_ barebones > >> installation. I'd like to get some feedback on possible logical > >> explanations. > >> > >> * What I'm seeing: The md5sum of all of my binaries in > >> /usr/bin and /usr/sbin are changing exactly one hour > >> after installation of CentOS-4.3. > > > > man prelink > > Aha! Well, the good news is that you are, of course, right and > there is a logical explanation for this after all (Whew!). > > The only bad news I guess, is that I've wasted so much time > looking for a mysterious problem that isn't there :-/ > > Just for posterity, the following was what I used to verify > that the changes were from prelinking: > > # prelink --undo /usr/sbin/lsof > # md5sum /usr/sbin/lsof Maybe not quite helpful for setting up tripwire, but rpm -V can verify checksums on files (or more correctly on files belonging to rpm packages) even with prelink enabled. Alternatively, if you havn't found it yet, prelink is disabled in /etc/sysconfig/prelink. /Peter > The md5sum from that last command gave me the result I > desired. Re-running prelink on /usr/sbin/lsof gives me > the "foreign" md5sum again. I guess I'll just have to prelink from > now on before I initialize tripwire. > > Thanks a ton, William. If you're ever in Boston, I owe > you a [ affordable beverage of your choice ]. > > - JZ -- ------------------------------------------------------------ Peter Kjellström | National Supercomputer Centre | Sweden | http://www.nsc.liu.se
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