centos系統檢視系統版本、核心版本、系統位數、cpu個數、核心數、線程數

centos檢視系統版本
cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core) 
 
1)檢視centos核心的版本：
[root@localhost ~]#  cat  /proc/version
Linux version 2.6.18-194.el5 ([email protected]) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-48))
#1 SMP Fri Apr 2 14:58:14 EDT 2010
 
2)顯示系統名、節點名稱、作業系統的發行版号、作業系統版本、運作系統的機器 ID 号
[root@localhost ~]#  uname -a
Linux localhost.localdomain 2.6.18-194.el5 
#1 SMP Fri Apr 2 14:58:14 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
 
3)顯示作業系統的發行版号
[root@localhost ~]#  uname -r
2.6.18-194.el5
 
檢視linux版本：
1) 列出所有版本資訊,
[root@localhost ~]#   lsb_release -a
LSB Version:     core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32:graphics-3.1-noarch
Distributor ID:   CentOS
Description:      CentOS release 5.5 (Final)
Release:          5.5
Codename:      Final
注:這個指令适用于所有的linux，包括Redhat、SuSE、Debian等發行版。
 
2) 執行cat /etc/issue,例如如下:
[root@localhost ~]# cat /etc/issue
CentOS release 5.5 (Final)
Kernel r on an m
 
3) 執行cat /etc/redhat-release ,例如如下:
[root@localhost ~]# cat /etc/redhat-release
CentOS release 5.5 (Final)
 
檢視系統是64位還是32位:
[root@localhost ~]#  getconf LONG_BIT
64
 
2、file /bin/ls
[root@localhost ~]#file /bin/ls
/bin/ls: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped
 
3、lsb_release  -a
[root@localhost ~]#lsb_release -a
LSB Version:    :core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32:graphics-3.1-noarch
Distributor ID: CentOS
Description:    CentOS release 5.5 (Final)
Release:        5.5
Codename:       Final
 
 
​​centos檢視系統cpu個數、核心​​​​數​​、線程數
1.檢視實體cpu個數
grep 'physical id' /proc/cpuinfo | sort -u | wc -l    
   2
2.檢視核心數量，即每個實體CPU中core的個數(即核數)
 grep 'core id' /proc/cpuinfo | sort -u | wc -l     6
3.檢視線程數（邏輯CPU的個數）
grep 'processor' /proc/cpuinfo | sort -u | wc -l 
   24
4.檢視cpu型号
dmidecode -s processor-version
5.檢視記憶體方法
 grep MemTotal /proc/meminfo# 總核數 = 實體CPU個數 X 每顆實體CPU的核數 
# 總邏輯CPU數 = 實體CPU個數 X 每顆實體CPU的核數 X 超線程數 
# 檢視實體CPU個數
cat /proc/cpuinfo| grep "physical id"| sort| uniq| wc -l2

# 檢視每個實體CPU中core的個數(即核數)
cat /proc/cpuinfo| grep "cpu cores"| uniq6

# 檢視邏輯CPU的個數
cat /proc/cpuinfo| grep "processor"| wc -l24