[CentOS] Remove all 3rd party rpms

[Michael A. Peters]

Joseph L. Casale wrote:
> How does one do this?
> 
> Also, is it possible an rpm installed by rpm and not yum does not 
> indicate what it provides to yum when yum queries needed dependencies 
> for another package?
> 
> Thanks!
> jlc
> 
> 

While you have gotten an answer that works - I believe there is a 
cleaner way.

I don't remember the exact command - and it may require the installation 
of a utilities package - but if you remove the 3rd party repositories 
from your yum configuration, there is a command that will identify and 
remove orphaned packages - packages which do not exist in any of the yum 
repositories yum is configured to use.

Anyone recall what that command is?