I may have asked this question before, but I don't remember seeing an answer that I grokked. Maybe I didn't ask the question correctly. My question is this: Suppose we have an install disk with a repo on it that specifies the following package sets (hypothetically) @SYSTEM = sbin sbin-utils sbin-diags devices core modsupport @DEVEL-BASE = gcc bin-utils gdb gprof gld ... I'd like to be able to come up with a compact notation for expressing what is on an installed system using the package sets with additions/ deletions. For example, suppose the running system has: ... sbin sbin-utils sbin-diags devices core gcc bin-utils gdb gprof gld gas ... then this could be represented as: @SYSTEM - modsupport @DEVEL-BASE +gas rather than just the complete list of packages. Why? I suspect that there might have been some package sets installed on an FC3 server that are no longer necessary, or that the composition of certain package sets has changed in FC5, so that if (for instance) gthumb has been replaced by eog in a certain package set, that when I install the package set it comes with the default packages for that distro. It also would be useful to know what had been removed from certain package sets (i.e. why modsupport was removed from the SYSTEM set). Is there an easy way to compute this? Thanks, -Philip P.S. Is this a question for kickstart instead?