How to Tell if Linux is 32-bit or 64-bit

Method One: getconf long_bit

Enter the getconf long_bit command on the Linux terminal

If it is a 32-bit machine, the result is 32

1. [Email protected] ~]# getconf long_bit
2. 32

If it is a 64-bit machine, the result is 64

1. [Email protected] ~]# getconf long_bit
2. 64

Method Two: Uname-a

If it is a 64-bit machine, it will output x86_64

1. [Email protected] ~]$ uname-a
2. Linux testweb01 2.6. 18-308.4. 1.el5 #1 SMP Tue Apr :£ ºEDT x86_64 x86_64 x86_64 gnu/linux

As you can see, the output of x86_64 in the results of the uname-a execution indicates that the machine is 64-bit, otherwise the machine is 32-bit

1. [Email protected] ~]# uname-a
2. Linux localhost.localdomain 2.6. 18-164.el5 #1 SMP Tue ::EDT i686 i686 i386 gnu/linux /c5>

Method Three: File/sbin/init or File/bin/ls

Example: 32-bit machine

File/sbin/init

1. [Email protected] ~]# 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. [Email protected] ~]# 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

Example: 64-bit machine

File/sbin/init

1. [Email protected] ~]$ File/sbin/init
2. /sbin/init:elf 64-bit LSB executable, AMD x86-, 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. [Email protected] ~]$ File/bin/ls
2. /bin/ls:elf 64-bit LSB executable, AMD x86-, version 1 (SYSV), for Gnu/linux 2.6. 9, dynamically linked (uses shared libs), for Gnu/linux 2.6. 9, stripped

The 64-bit or 32-bit in the command result can be used to determine whether the machine is 64-bit or 32-bit.

How to Tell if Linux is 32-bit or 64-bit