$ uname -a Linux 3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
Running ubuntu 12.04.1 LTS. Why does it have the architecture (x86_64) listed thrice?
1 Answer
I checked uname manual (man uname) and it says the following for the "-a" option:
print all information, in the following order, except omit -p and -i if unknown
In Ubuntu, I guess, options "-m", "-p" and "-i" (machine, processor and hardware-platform) are returning the machine architecture. For example, if you use the command
uname -mpi
You will see:
x86_64 x86_64 x86_64
On the other hand, if you choose all the option:
uname -snrvmpio
You will get the same result as:
uname -a
Output:
Linux <hostname> 3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
I also executed "uname" with options "-m", "-p" and "-i" on an ARCHLINUX distro and I got a different answer:
x86_64 unknown unknown
In fact, when I asked for "uname -a" on the ARCHLINUX distro the answer was:
Linux <hostname> xxxxxx-ARCH #1 SMP PREEMPT Mon Feb 14 20:40:47 CEST 2015 x86_64 GNU/Linux
While when executed "uname -snrvmpio" on the ARCHLINUX distro I got:
Linux <hostname> xxxxxx-ARCH #1 SMP PREEMPT Mon Feb 14 20:40:47 CEST 2015 x86_64 unknown unknown GNU/Linux
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On SunOS: 'SunOS nsd 5.9 Generic_122300-32 sun4u sparc SUNW,Sun-Fire-480R'Andreas Krey– Andreas Krey2015-03-06 11:34:54 +00:00Commented Mar 6, 2015 at 11:34
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2If you need an example of a more common one where all three are different, I found some examples on google of "i686 athlon i386".Random832– Random8322015-03-06 19:50:03 +00:00Commented Mar 6, 2015 at 19:50
uname -m