32 Bit 64 Bit Funda

How to identify the machine is 64-bit SUN/HP-UX/AIX ?

-on Solaris box the command :
a) dmesg | grep bit
if system is 64 bit then it returns with output :
SunOS Release 5.7 Version 64-bit [UNIX(R) System V Release 4.0]

b) isainfo -v
64-bit sparcv9 applications
32-bit sparc applications
When the same command is run on older SPARC systems, or on UltraSPARC systems running the 32-bit operating system:

% isainfo -v
32-bit sparc applications

-on HP box the command:
a) swlist | grep bit
if system is 64 bit then it returns output :
HPUXEng64RT B.11.00 English Hp-UX 64-bit Runtime Environment.

b) getconf command can be used with the following arguments
_CS_KERNEL_BITS
Returns whether the executing kernel is running in 32-bit or 64-bit mode.
_CS_HW_CPU_SUPP_BITS
"32" Only 32-bit HP-UX is supported
"32/64" Both 32-bit and 64-bit HP-UX are supported
"64" Only 64-bit HP-UX is supported.

- on AIX box
cat inittab | grep bit
if system is 64 bit then it returns with output :
load64bit:2:once:/etc/methods/cfg64 >/dev/console 2>&1 # Enable 64-bit execs

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