yum has a useful command called ‘provides’ or ‘whoprovides’.  It will tell you what package or RPM provides a particular file. The yum manual explains it as…

…used to find out which package provides some feature or file. Just use a specific name or a file-glob-syntax wildcards to list the packages available or installed that provide that feature or file.

Here is an example

yum whoprovides httpd
httpd.i386 : Apache HTTP Server

yum is an automatic updater and package installer/remover for rpm systems.