Originally Posted by linuxunix
What is the command to find out what CPU architecture the Linux Box holds out of following:
Since we're used to "architecture" meaning something else (for which X86_64 was your answer), it wasn't initially obvious we should focus on "out of the following".
I don't know of any Linux program to directly give you that answer.
/proc/cpuinfo and several other programs can tell you the exact CPU model, which is E5520.
Then you could manually find the E5520 spec on the Intel site:
On that page is a link that says "Formerly Nehalem-EP"
I'm not sure what they mean by "formerly". But it does seem to answer your microarchitecture question, saying.
Nehalem-EP is part of the family of 45nm processors based on Intel microarchitecture codename Nehalem