Red Hat has sent out a 1-year end-of-life notification for Red Hat Enterprise Linux 4. The company has also announced the availability of Extended Lifecycle Support (ELS) for Red Hat Enterprise Linux 4. "ELS, an optional Add-On for Red Hat Enterprise Linux, extends an existing Red Hat Enterprise Linux subscription for an additional three years over its standard seven year life-cycle. As a result, subscription customers have a choice of purchasing ELS to extend their use of Red Hat Enterprise Linux 4, or to upgrade to a more recent Red Hat Enterprise Linux 5 or 6 version."

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