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i686 = 32 bits
x86_64 = 64 bits
the command "getconf LONG_BIT" will work just as well.
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To check the processor for 64/32bit use: grep flags /proc/cpuinfo | grep lm
'arch' command is the shortest way to get this info
x86_64 systems can run both 32-bit and 64-bit software. `uname` and `arch` show you the compiled arch of specifically the kernel software, but not the capabilites of the actual hardware.
Too right mhs