An Internet connection isn't the only requirement. A remote console or a remote human are necessary. The former is expensive and requires planning with amd64 or i386. This is why the upgrade guides describe a manual/remote process. It is not foolproof, so testing on an equivalent machine locally is recommended. Or traveling to the remote server may become necessary for recovery.
Last edited by jggimi; 24th April 2012 at 09:44 AM.
Reason: typo
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