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How to determine if the operating system is running in 64 bit mode

Question & Answer


Question

This document contains commands to help you determine if your operating system is 32- or 64-bit.

Answer

The following are commands that can be executed to determine if you are running an operating system in a 64-bit mode:

  • HP-UX:
    $ getconf KERNEL_BITS
    64

    The output of the above command should be 64 for a 64-bit operating system.

  • SOLARIS:
    $ isainfo
    sparcv9 sparc

    The output for the above command should be sparcv9 sparc for a 64-bit operating System.

  • AIX® 4.3.3 and later:
    # bootinfo -y
    64

    The output of the above command should be 64 for a 64-bit hardware. The command must be executed as root.

    Note: on AIX, the -y option will specify if the hardware is 32- or 64-bit mode while bootinfo -K will specify if the kernel is 32- or 64-bit (this command must be run as root).

  • Linux
    uname -a

    Linux ora100 2.6.5-7.252-smp #1 SMP Tue Feb 14 11:11:04 UTC 2006 x86_64 x86_64 x86_64 GNU/Linux

    If the output has "x86_64",the environment is 64 bit.

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Document Information

Modified date:
16 June 2018

UID

swg21114965