方法一：getconf LONG_BIT

在linux终端输入 getconf LONG_BIT 命令

如果是32位机器，则结果为32

[cpp] view plain copy

[root@localhost ~]# getconf LONG_BIT

32

如果是64位机器，则结果为64

[cpp] view plain copy

[root@localhost ~]# getconf LONG_BIT

64

方法二：uname -a

如果是64位机器，会输出x86_64

[cpp] view plain copy

[chenzhou@testweb01 ~]$ uname -a

Linux testweb01 2.6.18-308.4.1.el5 #1 SMP Tue Apr 17 17:08:00 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux

可以看到，uname-a执行后的结果中输出了x86_64，说明该机器是64位的，否则代表该机器是32位的

[cpp] view plain copy

[root@localhost ~]# uname -a

Linux localhost.localdomain 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:54 EDT 2009 i686 i686 i386 GNU/Linux

方法三：file /sbin/init 或者 file /bin/ls

示例：32位机器

file /sbin/init

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[root@localhost ~]# file /sbin/init

/sbin/init: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped

file /bin/ls

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[root@localhost ~]# file /bin/ls

/bin/ls: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped

示例：64位机器

file /sbin/init

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[chenzhou@testweb01 ~]$ file /sbin/init

/sbin/init: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped

file /bin/ls

[cpp] view plain copy

[chenzhou@testweb01 ~]$ file /bin/ls

/bin/ls: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped

可以通过命令结果中的64-bit或者32-bit来判断该机器是64位还是32位

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