CentOS 7 system to view the system version and machine digits

This article is reproduced from: [CentOS7 view system version, view machine digits] (http://www.cnblogs.com/woshimrf/p/5883037.html)

Identification standard#

First of all, it must be clear what kind of logo is 32-bit and what is 64-bit.

PC server X86 series
I386--I686 are all 32 bits
x86_64 is 64-bit

View digit command#

There are really not too many commands. In order to prevent selective obstacles, the first method is unanimously chosen, and the latter is only a supplement.
method 1:

[ root@bogon ~]# uname -a
Linux bogon 3.10.0-327.18.2.el7.x86_64 #1 SMP Thu May 1211:03:55 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Method 2: Display system program information

[ root@bogon ~]# 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]=aa7ff68f13de25936a098016243ce57c3c982e06, stripped

Method 3:

[ root@bogon ~]# cat /proc/version
Linux version 3.10.0-327.18.2.el7.x86_64([email protected])(gcc version 4.8.320140911(Red Hat 4.8.3-9)(GCC)) #1 SMP Thu May 1211:03:55 UTC 2016

Method 4:

(In a 32-bit system, the int type and long type are generally 4 bytes, and the int type in a 64-bit system is still 4 bytes, but long has become an 8-byte inux system. Available "getconf WORD_BIT" and
" getconf LONG_BIT" gets the number of bits of word and long. In a 64-bit system, you should get 32 and 64 respectively.)

[ root@bogon ~]# getconf LONG_BIT
64

View system version#

method 1:

[ root@bogon ~]#  lsb_release -a
LSB Version::core-4.1-amd64:core-4.1-noarch:cxx-4.1-amd64:cxx-4.1-noarch:desktop-4.1-amd64:desktop-4.1-noarch:languages-4.1-amd64:languages-4.1-noarch:printing-4.1-amd64:printing-4.1-noarch
Distributor ID: CentOS
Description:    CentOS Linux release 7.2.1511(Core) 
Release:7.2.1511
Codename:   Core

Method 2:

[ root@bogon ~]# cat /etc/os-release
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

Method 3:

[ root@bogon ~]# cat /etc/redhat-release
CentOS Linux release 7.2.1511(Core)

Method 4:

[ root@bogon ~]# rpm -q centos-release
centos-release-7-2.1511.el7.centos.2.10.x86_64

View kernel version#

method 1:

[ root@bogon ~]# cat /proc/version
Linux version 3.10.0-327.18.2.el7.x86_64([email protected])(gcc version 4.8.320140911(Red Hat 4.8.3-9)(GCC)) #1 SMP Thu May 1211:03:55 UTC 2016

Method 2:

[ root@bogon ~]# uname -a
Linux bogon 3.10.0-327.18.2.el7.x86_64 #1 SMP Thu May 1211:03:55 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux