If you use yum for installing packages on your Linux box, you have to clean up few things once the installation is over. Else you will be wasting disk space unnecessarily. Yes, yum does help you with this house keeping work. Just try out yum clean option.
FYI: clean requires an option: headers, packages, cache, metadata, all
# yum clean all
Cleaning up Everything
600 headers removed
91 packages removed
16 metadata files removed
0 cache files removed
8 cache files removed
Happy house keeping…