查看linux是32位还是64位的方法总结

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1.getconf LONG_BIT

[root@localhost /]# getconf LONG_BIT64

2.uname

x86_64表示64位系统， i686 i386表示32位系统。

[root@localhost /]# uname -aLinux localhost.localdomain 3.10.0-514.el7.x86_64 #1 SMP Tue Nov 22 16:42:41 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

[root@localhost /]# uname -r3.10.0-514.el7.x86_64

[root@localhost /]# uname -mx86_64

3.arch

[root@localhost /]# archx86_64

4.file

[root@localhost /]# 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[root@localhost /]# file /bin/ls/bin/ls: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.32, BuildID[sha1]=3d705971a4c4544545cb78fd890d27bf792af6d4, stripped

5.cat /proc/cpuinfo | grep flags | grep ’ lm ’ | wc -l

结果大于0, 说明支持64bit计算. lm指long mode, 支持lm则是64bit。(参考网上的说法)

[root@localhost /]# cat /proc/cpuinfo | grep flags | grep ' lm ' | wc -l1

注意：getconf WORD_BIT命令不可用。去64bit机器上执行，getconf WORD_BIT显示结果还是32

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