How you will identify your Linux system is 32 bit or 64 bit?

use a commandon the shell terminal

uname -a

and if the result shows a string having only x86 than it is32 bit and if you find a string x86_64 than it is64 bit OS.

Try # uname -m 

The output is : if  i386 or i386 the system is32 

                       else if  x86_64  the system is64 

uname -a

above command will give you the details.

Linux server.domain.com2.6.32-504.3.3.el6.x86_64 #1 SMP Wed Dec1701:55:02 UTC2014 x86_64 x86_64 x86_64 GNU/Linux

as you can x86 means its a32 bit server

By using "arch" and "uname -m" anyone command we can get bit information