判断linux系统位数
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
[root@localhost ~]# getconf LONG_BIT
32
如果是64位机器，则结果为64
[root@localhost ~]# getconf LONG_BIT
64
方法二：uname -a
如果是64位机器，会输出x86_64
[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
[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
[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
[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
[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
[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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