uname and 64-bit OS

Rick Stevens rstevens at vitalstream.com
Wed Jun 29 18:43:12 UTC 2005

arun.nale at tcs.com wrote:
> Is i.86   means 32 bit ( I mean to say if 'uname -m' gives i686 which is 
> generally for xeon processor  is it 32 bit or 64 bit ) somewhere I read 
> that if it shows as i.XX (means i386/i486/i586/i686) means 32 bit

"i386", "i486", "i586" and "i686" and "athlon" all mean 32 bit.
"x86_64" means 64 bit (Opteron or Athlon-64). "i686-64" means 32-bit
operation with 64-bit address space (Intel 686 with the new memory
- Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
- VitalStream, Inc.                       http://www.vitalstream.com -
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