RPM is the package management system used by many Linux distributions including RedHat Enterprise, Fedora, SUSE, CentOS, Mandriva, and many others. Yum is the default package manager for RedHat Enterprise, Fedora and CentOS Linux distributions. In addition to yum, the OSUOSL is also hosting development sites for yum-utils, a collection of utilities and scripts built around yum, and createrepo, the program which creates metadata used in package repositories (supported by yum, apt-rpm, red-carpet, smart, up2date, and yast).