方法一：getconf LONG_BIT

在linux終端輸入getconf LONG_BIT命令

如果是32位機器，則結果為32

1. [root@localhost ~]# getconf LONG_BIT
2. 32

如果是64位機器，則結果為64

1. [root@localhost ~]# getconf LONG_BIT
2. 64

方法二：uname -a

如果是64位機器，會輸出x86_64

1. [chenzhou@testweb01 ~]$ uname -a
2. 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執行後的結果中輸出了x86_64，說明該機器是64位的，否則代表該機器是32位的

1. [root@localhost ~]# uname -a
2. 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位機器

file /sbin/init

1. [root@localhost ~]# file /sbin/init
2. /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

1. [root@localhost ~]# file /bin/ls
2. /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位機器

file /sbin/init

1. [chenzhou@testweb01 ~]$ file /sbin/init
2. /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

1. [chenzhou@testweb01 ~]$ file /bin/ls
2. /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

可以通過命令結果中的64-bit或者32-bit來判斷該機器是64位還是32位

如何判斷Linux是32位還是64位