centos查看系统版本
cat /etc/redhat-release CentOS Linux release 7.2.1511 (Core)
1)查看centos内核的版本：
[root@localhost ~]# cat /proc/version Linux version 2.6.18-194.el5 (mockbuild@builder10.centos.org) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-48)) #1 SMP Fri Apr 2 14:58:14 EDT 2010
2)显示系统名、节点名称、操作系统的发行版号、操作系统版本、运行系统的机器 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)显示操作系统的发行版号
[root@localhost ~]# uname -r 2.6.18-194.el5
查看linux版本：
- 列出所有版本信息,
[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:这个命令适用于所有的linux，包括Redhat、SuSE、Debian等发行版。
- 执行
cat /etc/issue,例如如下:
[root@localhost ~]# cat /etc/issue CentOS release 5.5 (Final) Kernel r on an m
- 执行
cat /etc/redhat-release,例如如下:
[root@localhost ~]# cat /etc/redhat-release CentOS release 5.5 (Final)
查看系统是64位还是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
1.查看物理cpu个数
grep 'physical id' /proc/cpuinfo | sort -u | wc -l 2
2.查看核心数量，即每个物理CPU中core的个数(即核数)
grep 'core id' /proc/cpuinfo | sort -u | wc -l 6
3.查看线程数（逻辑CPU的个数）
grep 'processor' /proc/cpuinfo | sort -u | wc -l 24
4.查看cpu型号
dmidecode -s processor-version
5.查看内存方法
grep MemTotal /proc/meminfo # 总核数 = 物理CPU个数 X 每颗物理CPU的核数 # 总逻辑CPU数 = 物理CPU个数 X 每颗物理CPU的核数 X 超线程数 # 查看物理CPU个数 cat /proc/cpuinfo| grep "physical id"| sort| uniq| wc -l 2 # 查看每个物理CPU中core的个数(即核数) cat /proc/cpuinfo| grep "cpu cores"| uniq 6 # 查看逻辑CPU的个数 cat /proc/cpuinfo| grep "processor"| wc -l 24
详细物理cpu，核数，逻辑cpu说明