On Sat, Jan 08, 2005 at 11:00:55PM -0500, Deron Meranda wrote: > On Sat, 8 Jan 2005 21:40:53 -0600 (CST), Mark Hittinger <bugs@xxxxxx> wrote: > > I ran into something curious. I installed FC3 on three computers with the > > same set of CD's and updated them with yum roughly at the same time. > > > > Afterwards I noticed that certain system binaries (for example /bin/csh and > > /bin/login) all have different 'sum' checksums on the three systems. > > The file sizes are the same. > > > This is a side effect of prelink (do a "man prelink"), which modifies binaries > to make them faster. > > To verify that your files are okay, try > > rpm -V -v tcsh > > Or you could also do something like, > > host1$ prelink -y /bin/tcsh >/bin/tcsh.orig > host1$ md5sum /bin/tcsh.orig > > host2$ prelink -y /bin/tcsh >/bin/tcsh.orig > host2$ md5sum /bin/tcsh.orig The above can be simplified into: /usr/sbin/prelink -y --md5 /bin/tcsh || echo /bin/tcsh modified Jakub
