How to check if linux is 32-bit or 64-bit

How to check whether Linux is 32-bit or 64-bit: 1. Execute the "getconf LONG_BIT" command, the output of 32 is 32-bit, and the output of 64 is 64-bit; 2. Execute the "uname -m" command, The output of "x86_64" is 64-bit, and the output of "i686" or "i386" is 32-bit.

#The operating environment of this tutorial: linux5.9.8 system, Dell G3 computer.

Check whether linux is 32-bit or 64-bit

##Method 1: getconf LONG_BIT Check

As shown in the following example: 32-bit Linux system displays 32, and 64-bit Linux system displays 64. The simplest and fastest way.

[root@DB-Server ~]# getconf LONG_BIT
32

[root@gettestlnx01 ~]# getconf LONG_BIT
64

Method 2: uname command to view

As shown in the following example, x86_64 Indicates a 64-bit system, i686 i386 indicates a 32-bit system. i686 is just a subset of i386. The supported CPUs start from Pentium 2 (686). Previous models are not supported.

[root@DB-Server ~]# uname -a
Linux DB-Server 2.6.18-194.el5 #1 SMP Tue Mar 16 21:52:43 EDT 2010 i686 i686 i386 GNU/Linux
[root@DB-Server ~]# uname -m
i686

[root@gettestlnx01 ~]# uname -a
Linux gettestlnx01 3.8.13-16.2.1.el6uek.x86_64 #1 SMP Thu Nov 7 17:01:44 PST 2013 x86_64 x86_64 x86_64 GNU/Linux
[root@gettestlnx01 ~]# uname -m
x86_64

Method 3: arch command to view

[root@DB-Server ~]# arch
i686
[root@gettestlnx01 ~]# arch
x86_64

Method 4: file command to view

[root@DB-Server ~]# 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
[root@DB-Server ~]#
[root@DB-Server ~]#
[root@DB-Server ~]# 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

[root@gettestlnx01 ~]# 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@gettestlnx01 ~]#
[root@gettestlnx01 ~]#
[root@gettestlnx01 ~]# 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

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