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You can use prtconf to get the bitness of the running kernel: $ prtconf -k Kernel Type: 64-bit You could also ls -l /unix or file /unix, but that's not guaranteed to be the kernel you're currently booted from. $ file /unix /unix: 64-bit XCOFF executable or object module not stripped $ ls -l /unix lrwxrwxrwx 1 root system 21 Dec 9 06:48 ...


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There are two benefits that I can think of. Both are "minor". First, you won't have 32 bit libs installed. Some times (though it is rare) you could end up using 32 bit libs when you meant to be using 64 bit libs. This is very rare and usually only happens when you, the user, are messing with trying to get pre-compiled software running using override tricks. ...



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