Linux system View System is a 32-bit or 64-bit method summary

This blog is a summary, summed up to see whether the Linux system is 32-bit or 64-bit methods, a lot of content from online netizens blog. This article is just to tidy up, comb this knowledge, easy to forget the time to check at any time.

Method 1:getconf long_bit View

As shown in the following example: 32-bit Linux systems show 32, 64-bit Linux systems display 64. The simplest and quickest way.

[Email protected] ~]# getconf long_bit

32

[Email protected] ~]# getconf long_bit

64

Method 2:uname command View

As the following example shows, x86_64 represents a 64-bit system, and i686 i386 represents a 32-bit system. i686 is only a subset of the i386, supported CPUs starting from Pentium 2 (686), the previous model is not supported.

[Email protected] ~]# uname-a

Linux db-server 2.6.18-194.el5 #1 SMP Tue Mar 21:52:43 EDT all i686 i686 i386 gnu/linux

[Email protected] ~]# uname-m

i686

[Email protected] ~]# uname-a

Linux gettestlnx01 3.8.13-16.2.1.el6uek.x86_64 #1 SMP Thu Nov 7 17:01:44 PST-x86_64 x86_64 x86_64 Gnu/linux

[Email protected] ~]# uname-m

x86_64

Method 3: Arch Command view

[Email protected] ~]# Arch

i686

[Email protected] ~]# Arch

x86_64

Method 4: View the File command

[Email protected] ~]# 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

[Email protected] ~]#

[Email protected] ~]#

[Email protected] ~]# 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 Li BS), for Gnu/linux 2.6.9, stripped

[Email protected] ~]# 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

[Email protected] ~]#

[Email protected] ~]#

[Email protected] ~]# File/bin/ls

/bin/ls:elf 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for Gnu/linux 2.6.18, Stripped

Method 5: This method comes from David's blog and checks the CPU for information to determine if the Linux system is a 64-bit operating system. If the result is greater than 0, the description supports 64bit calculations. LM refers to long mode, which supports LM while it is 64bit.

[Email protected] ~]# Cat/proc/cpuinfo | grep Flags | grep ' LM ' | Wc-l

0

[Email protected] ~]# Cat/proc/cpuinfo | grep Flags | grep ' LM ' | Wc-l

6

References:

http://www.cnblogs.com/dingchenghong/archive/2012/06/29/2569456.html

http://blog.csdn.net/tianlesoftware/article/details/6267115

Http://www.cnblogs.com/JemBai/archive/2012/05/25/2517783.html