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How do I determine if my x86-compatible Intel system is multi-processor, multi-core or supports hyperthreading?

Updated 2014-02-26T00:19:54+00:00

Issue

How do I determine if my x86-compatible Intel system is multi-processor, multi-core or supports hyperthreading?

Environment

Red Hat Enterprise Linux 4.2 and later

Red Hat Enterprise Linux 5

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