The post will explain, how to find cpu processor supporting 64 bit or 32 bit. In modern time, most of application are released with 64 bit compatibility only. Recently Chromium Dev team has announced in google forum about no support to 32 bit version in coming years.

You should also know that 64 Bit Operating System can only be installed if motherboard has 64 bit CPU Processor. Whereas you can install 32 bit Operating System in both cases when motherboard has either 32 bit or 64 bit CPU Processor.

To see your processor type of supporting bit on Linux System, you can run the below given command.

Note: lm stands for Long Mode which equates to a 64-bit CPU.

egrep -c ' lm ' /proc/cpuinfo

If command’s output is 0 , it means that your CPU is not 64-bit.
If command’s output is 1 or higher, it means that your CPU is 64-bit .

In below screenshot you can see the O.S is 32 bit but installed in 64bit processor based machine.