Is it 64 or 32 bit ..??

When I heard this Q for the second time today at my office…
I thought of writing this a mail to my dear colleagues… :)

0. Linux

$ uname -a

If the command throws ia64 (Intel Architecture-64) OR x86_64 GNU/Linux.
Guess what it is..??

..if ya seen only i686 i586 i386 GNU/Linux >> I am sure the kernel should not support 64 bit.

1. IBM-AiX

$ file /usr/lib/boot/unix*

2. SUN OS/Solaris

$ isainfo -v

If ya couldn’t find the above command…Try

$ uname -a

SUN OS 5.7 or greater is 64 bit compliant

solaris 2.7 or greater is 64 bit compliant.

x. windows

hmmm… Live free… or die….

3 Responses to “Is it 64 or 32 bit ..??”

  1. Aju Says:

    If you run isainfo -n

    and it reports


    and isinfo -k


    and isinfo -b


    Then you can confirm that you are running 64bit Solaris and apps.

  2. Dag Wieers Says:

    The problem is that uname will report what the operating systems is, not
    what the hardware is. This is what I get when I run a 32bit rhel3as on
    a 64bit blade:

    [root@xxxxxxx root]# uname -a
    Linux xxxxxxx 2.4.21-40.ELsmp #1 SMP Thu Feb 2 22:22:39 EST 2006 i686 i686 i386 GNU/Linux

    [root@xxxxxxx root]# dmidecode | grep Product
    Product Name: ProLiant BL20p G

    [root@xxxxxxx root]# lspci -v | grep 64-bit
    00:1c.0 PCI bridge: Intel Corporation 6300ESB 64-bit PCI-X Bridge (rev 02) (prog-if 00 [Normal decode])
    Memory at fdef0000 (64-bit, non-prefetchable) [size=64K]
    Memory at fdee0000 (64-bit, non-prefetchable) [size=8K]
    Memory at fde80000 (64-bit, non-prefetchable) [size=256K]
    Memory at fdff0000 (64-bit, non-prefetchable) [size=64K]
    Memory at fdfe0000 (64-bit, non-prefetchable) [size=64K]
    Memory at fdfd0000 (64-bit, non-prefetchable) [size=64K]

    I had hoped that some of the CPU flags would identify what I was looking for, but sadly I know too little about the subject. It would be nice to
    have a tool that can identify this without any doubt.

  3. vipin sagar Says:

    Hello Dag,
    Good too see ya comment…

    I am afraid; have ya tried the “lshw” (List Hardware) option. I installed it to get the
    hardware details. :-)

    Here is my output.

    [root@vipin ~]# lshw | less
    description: Computer
    product: 682452A
    vendor: IBM
    serial: 2FND360
    width: 32 bits

    description: CPU
    product: Intel(R) Pentium(R) 4 CPU 1.80GHz
    vendor: Intel Corp.
    physical id: 4
    bus info: cpu@0
    version: 15.2.4
    slot: WMT478/NWD
    size: 1800MHz
    capacity: 2800MHz
    width: 32 bits
    clock: 100MHz

    [root@vipin ~]# lshw | grep width
    width: 32 bits
    width: 32 bits
    width: 64 bits /* my -memory -bank:0 width */
    width: 32 bits
    width: 32 bits
    width: 32 bits
    width: 32 bits
    width: 32 bits
    width: 32 bits

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