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Can you upgrade cPanel/WHM servers with CentOS 4.9 and 5.8 up to CentOS 6.x?

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closed as off topic by Michael Hampton, EEAA, mdpc, Tom O'Connor, Brent Pabst Dec 10 '12 at 13:04

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2 Answers 2

In-place upgrades are a difficult process. You will probably want to rebuild onto new servers and migrate your data. That gives you a test platform and a fallback point in case you application needs tweaking on the new OS.

In-place upgrades are no longer supported.

See:
Upgrade CentOS 5.x to CentOS 6.x - tips and techniques
and
Why is it so difficult to upgrade between major versions of Red Hat and CentOS?

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No, upgrading between major centos releases is not supported and requires a reinstall.

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