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How can I determine if my OS is 64-bit compliant?

Title   How to determine that your OS is 64-bit compliant
Author Pete Huckelba, StataCorp
Date June 2005

Unix (IBM-AIX, HP-UX, Tru-64)

Type file /path/to/kernel, and note the output. For example, under AIX you might see:

/usr/lib/boot/unix: 64-bit XCOFF executable or object module not stripped

Linux

Type uname -a. Something like the following should be displayed:

Linux pecos.stata.com 2.6.10-1.770_FC3smp #1 SMP Thu Feb 24 18:36:43 EST 2005 x86_64 x86_64 x86_64 GNU/Linux

Note how both entries refer to 64 bit or x86_64. If you do not know where the kernel is installed, you will need to contact your System Administrator.