How to check whether the system is 32-bit or 64-bit in Linux?

CentOS is a Linux distribution that originated from RHEL and is compiled in accordance with the regulations of open source code. Moreover, it maintains functional compatibility with RHEL and is a free, open source operating system that users can use and modify without paying copyright fees. So does CentOS distinguish between 32-bit and 64-bit in Linux? Please see below for details.

CentOS distinguishes between 32-bit and 64-bit!

Main differences:

CentOS 32bit system is mainly released for PC;

CentOS 64bit system is mainly aimed at large-scale scientific computing;

64bit Linux system is mainly installed on 64bit hardware system;

32bit Linux system can be installed on 32bit hardware system, or it can be installed on 64bit hardware but the running effect is not good;

64bit addressing space is larger and 128G memory can be addressed and operated;

　The 32-bit addressing space is basically unusable in Oracle systems. Large memory support can be enabled through PAE.

How to check whether the system is 32-bit or 64-bit?

　1. uname-a

If there is x86_64, it is 64-bit, if not, it is 32-bit

If followed by X686 or X86_64, the kernel is 64-bit, and if i686 or i386, the kernel is 32-bit.

　2. file/sbin/init

　[root@localhost ~]# file/sbin/init

　/sbin/init: ELF 32-bit LSB shared object,Intel 80386,version 1
(SYSV),dynamically linked(uses shared libs),for GNU/linux 2.6.18,stripped

　3. file/bin/ls

　[root@localhost ~]# file/bin/ls

　/bin/ls:ELF 32-bit LSB executable,Intel 80386,version 1 (SYSV),dynamically
linked (uses shared libs),for GNU/linux 2.6.18,stripped

The above is the detailed content of How to check whether the system is 32-bit or 64-bit in Linux?. For more information, please follow other related articles on the PHP Chinese website!