on my rhel5.5 machine. During the course I answered 'y' to one of the questions asked, which may have lead to the problem I'm about to describe - I don't know because I can't reproduce the problem at the moment.
well you will be VERY VERY careful about using the "yes" answer to removing 100 rpm dependencies
some of them were "glibc (libc.so) , rpmlib, libz "
reinstall the OS
will take about 30 min. then restore the user data from your nightly back up that you did??? make ???
fixing using a second computer to dl and burn to cd a few rpms at a time and installing them in a non working RHEL ( if you can - you might not be able to ) will take a few DAYS