Major new versions of Red Hat Enterprise Linux (RHEL) don't come along that often — which is the way the platform's corporate buyers generally like it. Still, the relentless march of technology means that new versions are needed from time to time, and with RHEL 6 Red Hat is both playing catch-up on advances since the last big overhaul and looking to future-proof its platform.

To be fair, there have been interim updates since RHEL 5 was introduced back in 2007 — the most recent, RHEL 5.5, was just under a year ago. However, that did little to address the underlying scalability of the Red Hat Linux distro — a charge that can't be levelled at its successor, which is designed to take full advantage of the latest developments in multi-core and other hardware technologies, and then some.

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