[Beowulf] 32 bit or 64bit pkgs re /usr/local over NFS is okay, Joe
tjrc at sanger.ac.uk
Mon Jul 7 05:44:01 PDT 2008
On 7 Jul 2008, at 11:29 am, Carsten Aulbert wrote:
> Jon Aquilina wrote:
>> so what your telling me to make sure im running 64bit bins is to
>> the /usr/bin. if im not im best compiling from source?
> Well other possiblities are:
> look at the output of uname -a
> if you get i686 you are running a 32bit kernel if the output contains
> x64_64 you are running a 64 bit kernel (sometimes uname -m tells you
That's unreliable. It's possible to run a 64-bit kernel with a 32-bit
userland, so just because uname returns x86_64 that doesn't mean you
can definitely run 64-bit userland binaries.
> For Debian/*buntu: see if you can install ia32 packages. These are
> compatibility packages to run 32bit binaries under 64bit systems.
> Obviously those are not needed on 32bit systems and hence not
> - as far as I know.
The cast-iron way to do it on Debian/Ubuntu is the output of:
That will print "i386" for 32-bit Intel, and "amd64" for x86_64.
Obviously for other supported architectures it prints other things.
It will print the correct thing regardless of whether the kernel is
32- or 64-bit.
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