Hello to all;

I need some deep information related to Linux System details.
I want to downlaod some rpms related to oracle. I am getting confused with following identifications

GUEST OS DETAILS
MY HOST SYSTEM DETAILS

My confusions are
x86 refers 32 bit ..then what's need for 32 bit link seperatly ?

I think the reason you are confused is that the item is not at all clearly written. Offhand, I can interpret that excerpt three different ways at first glance.

I have no idea what the writers are trying to say without some larger context. Can you link to the source and provide more context?

Oracle's rebuild of RHEL4
and unless you have a red hat "extra" extended life support contract for RHEL4 ( you do not have RHEL but oracles version )

it is unsupported

time to upgrade to the current rhel 6.4 ( or oracles version of it )

x86_64 is the 64 bit operating system software
the x86,i686,and i386 are the 32 bit versions

youe hardware is 64 bit
but it looks like that old el4 operating system is 32 bit (i386 GNU/Linux )

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Hi Jhon ;

Thank You very much ! I have 32 bit OS .No more doubt.

*NIX flavors having 32 bit kernel and 64 bit kernel.

If have 32 bit OS , can i upgrade my OS from 32 bit kernel to 64 bit kernel ?

- without any change existing hardware.


Any big difference between 32 bit machine vs 32 bit OS kernel ?

- If so , Could you please explain some more ?


Regards
Sham

Depends on what you mean by "difference".

Some 32 bit machines have extended addressing to support more than 4GB of memory. To use it you must have a "PAE" (page address extension) kernel. Such a kernel will not run on a platform that doesn't support the extension.

PAE kernels use the extra memory to support additional processes, and/or buffer space. A single user process still can't address more than 4GB (actually less, as the kernel reserves about 1G for communicating with the process).

If you have less than about 6GB of memory, the PAE kernel won't really help that much (but won't hurt either).

The kernel names will usually identify the system. I have Fedora, and besides embedding the kernel name, it also embeds the version. The full name from "uname -a" is: "Linux panther 3.6.11-4.fc16.x86_64 #1 SMP Tue Jan 8 20:57:42 UTC 2013 x86_64 x86". The name for the release is 3.6.11-4.fc16.x86_64 - indicating it is Linux kernel 3.6.11 (with the fourth release with RH patches), Fedora 16. for X86_64 (the 64 bit version). A PAE kernel will have PAE in the name, and instead of X86_64 it will just be X86.

If the hardware is intel/AMD 64 bit, then it will also support 32 bit binaries, though you sometimes have to add 32 bit runtime libraries to get the system to run. 64 bit libraries are normally in /lib64, with 32 bit libraries in /lib to allow the same version of the library to exist for both architectures.

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