Linux Command ( 32Bit or 64Bit Check )

1. # uname -m
x86_64

2. #  uname -a
Linux willmedia 2.6.32-504.el6.x86_64 #1 SMP Wed Oct 15 04:27:16 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

3. # file /sbin/init
/sbin/init: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, stripped

4. #  arch
x86_64