They support much further back that that. Red Hat still offers support for RHEL4 and will do until March 31, 2017. It was originally released in 2005. They'l

They support much further back that that. Red Hat still offers support for RHEL4 and will do until March 31, 2017. It was originally released in 2005. They'll be supporting RHEL7 (with Systemd 208) in some form until 2027