CentOS yum之$releasever和$basearch

本文介绍了如何查看YUM配置,包括检查/etc/yum.repos.d/目录下的文件和具体repo文件内容的方法。文中还解释了$releasever和$basearch两个重要变量的作用及获取方式。
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查看关于yum的配置

ls /etc/yum* -ld:



查看/etc/yum.repos.d下的文件: 

ls /etc/yum.repos.d/

查看puppetlabs.repo内容:

cat puppetlabs.repo


我们看出来里面包含大量的变量:

$releasever和$basearch

$releasever的值,这个表示当前系统的发行版本,可以通过如下命令查看:

rpm -qi centos-release

结果如下:


其中的Version:6就是我们系统的版本号

$basearch是我们的系统硬件架构(CPU指令集),就是我们常说的i386\i486\i586\i686\...

使用如下命令即可:

arch

我这个处理器是X86_64,安装时安装程序检测到你得CPU级别后,自动为你安装相应内核。 

在Linux中使用命令arch可以初步查看出当前系统所识别出来的机器CPU类型,如"i386", "i486","i586", "alpha", "sparc", "arm", "m68k","mips","ppc","ia64","x86_64"等;ia64和x86_64就说明这台机器是64位的;


顺便提一下,windows下获取系统信息的命令:cmd中输入:systeminfo:


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# CentOS-Base.repo # # The mirror system uses the connecting IP address of the client and the # update status of each mirror to pick mirrors that are updated to and # geographically close to the client. You should use this for CentOS updates # unless you are manually picking other mirrors. # # If the mirrorlist= does not work for you, as a fall back you can try the # remarked out baseurl= line instead. # # [base] name=CentOS-$releasever - Base baseurl=https://mirrors.aliyun.com/centos/$releasever/os/$basearch/ gpgcheck=1 gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 [updates] name=CentOS-$releasever - Updates baseurl=https://mirrors.aliyun.com/centos/$releasever/updates/$basearch/ gpgcheck=1 gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 [extras] name=CentOS-$releasever - Extras baseurl=https://mirrors.aliyun.com/centos/$releasever/extras/$basearch/ gpgcheck=1 gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 [centosplus] name=CentOS-$releasever - Plus baseurl=https://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/ gpgcheck=1 enabled=0 gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 #contrib - packages by Centos Users [contrib] name=CentOS-$releasever - Contrib - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/contrib/$basearch/ http://mirrors.aliyuncs.com/centos/$releasever/contrib/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/$releasever/contrib/$basearch/ gpgcheck=1 enabled=0 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
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