Difference between CPU core and sockets?
 

anyone who can help me with how to differentiate cores and sockets in CPU?

A socket is actually what the CPU chip is connected into, and refers in common language to the chip itself. A core is a full blown CPU sitting on the chip. For many years, this was a one to one relationship. One chip = one CPU. Now we have chips being sold that have multiple cores inside them. So one socket (chip) may have 1, 2 or 4 cores on it, and expect more...

To see what you have...

If you want information on the CPU, you can use the commands "lshw" or "x86info". Looking up the specifications of your motherboard will show you what the CPU socket is.

The motherboard name and model should also be shown in the results of "lshw" Google will do the rest.

May I know on which distribution x86info command works?
I tried it in ESX or CenTOS its not there.

Among others...

I have it on openSUSE 11.2. You may not have it in a your CentOS installation or repository, but Google should find an RPM if you search.

You should find that the reply to your other thread, is universally applicable, but, individual distributions will have specific tools that are not universal.

You might have lscpu, or hwinfo on yours; in any case, you should be able to get clues from something commands like 'apropos' or 'man -k' combined with 'cpu', 'hardware' or 'core'.