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I am writing a bash script to deal with some installations in an automated way... I have the possibility of getting one such program in 32 or 64 bit binary... is it possible to detect the machine architecture from bash so I can select the correct binary?
This will be for Ubuntu machines.
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If you're interested in the CPU itself, look at /proc/cpuinfo for details about the CPU(s) detected by the Linux kernel. which tells us that it's a 32-bit executable using the Intel 80386 instruction set (possibly with extensions). Note that it isn't quite as simple as 32-bit versus 64-bit architectures.
Therefore, the “/usr/lib/libc-2.33.so” file is a 64-bit library and the other one is a 32-bit library. Also, if we have a look at their “start address” fields, they have 64-bit and 32-bit wide addresses respectively.
$2 is the second command-line argument passed to the shell script or function. Also, know as Positional parameters.
MACHINE_TYPE=`uname -m` if [ ${MACHINE_TYPE} == 'x86_64' ]; then # 64-bit stuff here else # 32-bit stuff here fi Does
uname -a give you anything you can use? I don't have a 64-bit machine to test on.
Note from Mike Stone: This works, though specifically
uname -m Will give "x86_64" for 64 bit, and something else for other 32 bit types (in my 32 bit VM, it's "i686").
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