Full Discussion: Linux 32bit or 64bit
Operating Systems Linux Linux 32bit or 64bit Post 302136229 by Crazy_murli on Sunday 16th of September 2007 02:42:47 PM
Old 09-16-2007
64-bit or 32-bit OS

uname -a

If its 64-bit linux, it shows x86_64 in the output of the above uname command. Otherwise its 32-bit .

Hope it helps.

Cheers, Bru.
 

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optisa(1)							   User Commands							 optisa(1)

NAME
optisa - determine which variant instruction set is optimal to use SYNOPSIS
optisa instruction_set... DESCRIPTION
optisa prints which instruction_set out of the ones specified in the command will perform best on this machine. In this case, ``best'' is defined by the order in which instruction set names are returned by isalist(1). Possible values for instruction_set are given in isalist(5). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ EXIT STATUS
The following exit values are returned: 0 One of the instruction_set values you specified is printed by this command. 1 There is no output; that is, this machine cannot use any instruction_set that you specified with the optisa command. SEE ALSO
isalist(1), uname(1), attributes(5), isalist(5) NOTES
optisa is preferable to uname -p or uname -m (see uname(1)) in determining which of several binary versions of a given program should be used on the given machine. SunOS 5.10 25 Jul 1997 optisa(1)

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