Yum Cache Clear command

When a package is downloaded, installed and is removed there is a chance that the package may still be saved/stored in the yum’s cache. So to clean all the cached packages from the enabled repository cache directory, login as root and execute the following:

yum clean packages

To purge the old package information completely, execute the following command:

yum clean headers

To clean any cached xml metadata from any enabled repository, execute the following

yum clean metadata

If you wish to clean all the cached files from any enabled repository at once, execute the Following command:

yum clean all