Red Hat Enterprise Linux derivatives

However, as the license terms on which it is based explicitly stipulate, Red Hat had previously made the entire source code available via their network of servers.

For convenience, several of the free alternatives ship with yum replacing up2date, something that makes providing mirrors for upgrades significantly easier.

Red Hat Enterprise Linux 5 and above releases use yum as their native system for providing updates, with up2date being just its front end.

Free redistributions are expressly encouraged by the GNU General Public License upon which Red Hat's distributions are derived.

CentOS received such a notice seeking to have it remove all mention of Red Hat's asserted trademarks from their website and their distribution.