幾種查看CentOS版本信息的方法

1. 查看CentOS的kernel版本

查看文件/proc/version

# cat /proc/version 
Linux version 3.10.0-229.el7.x86_64 ([e-mail]) (gcc version 4.8.2 20140120 (Red Hat 4.8.2-16) (GCC) ) #1 SMP Fri Mar 6 11:36:42 UTC 2015

通過uname命令查看

# uname -r
3.10.0-229.el7.x86_64

uname命令參數說明

  -a, --all                print all information, in the following order,
                             except omit -p and -i if unknown:
  -s, --kernel-name        print the kernel name
  -n, --nodename           print the network node hostname
  -r, --kernel-release     print the kernel release
  -v, --kernel-version     print the kernel version
  -m, --machine            print the machine hardware name
  -p, --processor          print the processor type or "unknown"
  -i, --hardware-platform  print the hardware platform or "unknown"
  -o, --operating-system   print the operating system

2. 查看CentOS系統版本

查看文件/etc/centos-release和/etc/redhat-release

cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)
 

" style="border: 0px; display: block;font-family: Consolas, Inconsolata, Courier, monospace; font-weight: bold; white-space: pre; margin: 0px;border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; word-wrap: break-word; border: 1px solid rgb(204, 204, 204); padding: 0px 5px; margin: 0px 2px;font-size: 1em; letter-spacing: -1px; font-weight: bold;"> # cat /etc/centos-release
CentOS Linux release 7.2. 1511 (Core)

# cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)

查看文件/etc/issue，注意：在centos7中沒有具體信息。

# cat /etc/issue

\S

Kernel \r on an \m

查看文件/etc/redhat-release

# cat /etc/redhat-release 

CentOS Linux release 7.1.1503 (Core)

LSB是Linux Standard Base的縮寫，lsb_release命令用來顯示LSB和特定版本的相關信息。
這個命令適用於所有的linux，包括Redhat、SuSE、Debian、Centos等發行版。
-a, --all 就是顯示所有信息，顯示包括版本信息、發行版的ID、發行版的描述信息、具體版本號、發行版代號的信息。

<code class="bash" data-origin="
# yum install -y redhat-lsb-core

lsb_release -d
Description: CentOS Linux release 7.1.1503 (Core)
lsb_release -a
LSB Version: :core-4.1-amd64:core-4.1-noarch
 Distributor ID: CentOS
 Description: CentOS Linux release 7.2.1511 (Core)
 Release: 7.2.1511
 Codename: Core
 
" style="border: 0px; display: block;font-family: Consolas, Inconsolata, Courier, monospace; font-weight: bold; white-space: pre; margin: 0px;border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; word-wrap: break-word; border: 1px solid rgb(204, 204, 204); padding: 0px 5px; margin: 0px 2px;font-size: 1em; letter-spacing: -1px; font-weight: bold;"># yum install -y redhat-lsb-core

# lsb_release -d

Description:    CentOS Linux release 7.1.1503 (Core)
# lsb_release -a

LSB Version:    :core-4.1-amd64:core-4.1-noarch

Distributor ID: CentOS

Description:    CentOS Linux release 7.2.1511 (Core)

Release:    7.2.1511

Codename:   Core

lsb_release的具體可以用lsb_release -h查看幫助

  -i, --id

Display the string id of the distributor.

-d, --description

Display the single line text description of the distribution.

-r, --release

Display the release number of the distribution.

-c, --codename

Display the codename according to the distribution release.

-a, --all

Display all of the above information.

-s, --short

Use short output format for information requested by other options (or version if none).

3. 查看系統是64位還是32位

x86_64 是 64位
i386 i686 都是32位

# uname -i

x86_64

也可以通過file命令查看系統命令來確定。

# 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

參考

幾種查看CentOS版本信息的辦法