辨識標準

首先要清楚什麼樣標識是32位的，什麼樣的是64位的。

PC server X86 系列

I386--I686 都是32位

x86_64 是 64位

命令實在是不要太多，為了防止選擇性障礙，一致選擇第一種方式，後面的僅作為補充。
方法1：

[[email protected] bob]# uname -a
Linux localhost.localdomain 3.10.0-862.el7.x86_64 #1 SMP Fri Apr 20 16:44:24 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

方法2：顯示系統程式資訊

[[email protected]
 
 bob]# 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]=c5ad78cfc1de12b9bb6829207cececb990b3e987, stripped

方法3：

[[email protected] bob]# cat /proc/version
Linux version 3.10.0-862.el7.x86_64 ([email protected]
 
) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-28) (GCC) ) #1 SMP Fri Apr 20 16:44:24 UTC 2018

檢視系統版本

方法1：

[[email protected] bob]# 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"
 

方法3：

[[email protected] bob]# cat /etc/redhat-release
CentOS Linux release 7.5.1804 (Core)

方法4：

[[email protected] bob]# rpm -q centos-release
centos-release-7-5.1804.el7.centos.x86_64

檢視核心版本

方法1：

[[email protected] bob]# cat /proc/version
Linux version 3.10.0-862.el7.x86_64 ([email protected]) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-28) (GCC) ) #1 SMP Fri Apr 20 16:44:24 UTC 2018

方法2：

[[email protected] bob]# uname -a
Linux localhost.localdomain 3.10.0-862.el7.x86_64 #1 SMP Fri Apr 20 16:44:24 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux