different 'sum' on three different FC3 installs

[Jakub Jelinek]

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 at pu.net> 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