on a yum update, yum didn't do cleanup.
Now I have a lot of duplicate packages, e.g.:
rpm -q libidn-devel libidn-devel-0.5.6-1 libidn-devel-0.5.15-1
How can I erase all the old packages?
I know of no easy automatic way to do it, other than manually. In this case,
rpm -e libidn-devel-0.5.6-1