Check if Kubuntu is running on 64bit or 32bit machine

Question

How can I check if my kubuntu is running in a 64 bits or 32 machine using terminal?

Answer 1

Run

uname -a

My machine gives this:

Linux james-desktop 2.6.38-11-generic #48-Ubuntu SMP Fri Jul 29 19:02:55 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

It should be easy to figure out if your box is 32 bit or 64 bit from the string your box gives you.

Answer 2

This page says to run

$ grep flags /proc/cpuinfo

and if the lm flag (long mode, I think) is present, you have a 64-bit CPU. The same page also describes JamWaffles's answer of using the kernel's targeted architecture.

Answer 3

cat /proc/cpuinfo 

look for "lm" under flags LM stands for Long Mode - which is support for a 64 bit programme to access 64 bit instructions