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Easy and direct way to find this out.
Needed a quick way to see if my server distro that I setup years ago was running 32bit or not, since with time I had forgotten.
Note: does not check _hardware_ e.g. /proc/cpuinfo but rather the kernel installed
This is likely only valid on Solaris based systems. Unfortunately a lot of the more universal techniques for determining if a system is 32bit or 64bit on x86 solaris fail to give much more information than "i86pc"
This command tell you if your hardware is 32 or 64 bits even if you install a 32bits OS on a 64 bits hardware.
If your distro don't support the -q switch, try doing :
grep &>/dev/null '\<lm\>' /proc/cpuinfo && echo 64 bits || echo 32 bits
If you can do better, submit your command here.
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