How can I find out that my CPU supports 64bit operating systems under Linux, e.g.: Ubuntu, Fedora?
Answers:
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Method 1
I think the easiest way is by:
lscpu|grep "CPU op-mode"
Method 2
Execute:
grep flags /proc/cpuinfo
Find ‘lm’ flag. If it’s present, it means your CPU is 64bit and it supports 64bit OS. ‘lm’ stands for long mode.
Alternatively, execute:
grep flags /proc/cpuinfo | grep " lm "
Note the spaces in " lm ". If it gives any output at all, your CPU is 64bit.
Update: You can use the following in terminal too:
lshw -C processor | grep width
This works on Ubuntu, not sure if you need to install additional packages for Fedora.
Method 3
If your CPU is a 64bit one (x86-64), you can use it with a 64 bit OS.
Here is a list of 64bit CPUs: http://en.wikipedia.org/wiki/64-bit#Current_64-bit_microprocessor_architectures
Method 4
via this command dmidecode -t processor we can check the processor capability.
Method 5
Don’t rely on the high scoring answers to this question because these methods are not always correct.
I’ve a computer with a Intel Atom N230 CPU which according to all of the tests mentioned is capable to support 64 bit OS’es.
According to http://en.wikipedia.org/wiki/Intel_Atom#32-bit_and_64-bit_hardware_support the CPU is not capable of running 64 bit OS’es.
I’ve tried to install a 64 bit Linux OS and it indeed refuses to do so. Installing a 32 bit Linux OS works.
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0