查看linux机器是32位还是64位的方法

file
/sbin/init 或者file /bin/ls

/sbin/init: ELF64-bitLSB
executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, stripped

如果显示 64-bit 则为64位；

file /sbin/init

/sbin/init: ELF32-bitLSB
executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.5, dynamically linked (uses shared libs), stripped

如果显示为32 bit 则为32bit；
uname -a:

uname -a

Linux pmx002**.**.** 2.6.32-71.el6.x86_64 #1 SMP Wed Sep 1 01:33:01 EDT 2010x86_64x86_64
x86_64 GNU/Linux

x86_64表示64位机器

uname -a

Linux pmx0**.**.** 2.6.9-5.ELsmp #1 SMP Wed Jan 5 19:30:39 EST 2005i686i686
i386 GNU/Linux