【Linux】yum安装

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一、删除原来的yum源

1、检查yum源：

rpm -qa | grep yum 

2、删除原来的yum源

rpm -qa|grep yum|xargs rpm -e --nodeps 

3、防止系统自带的插件subscription-manager订阅管理器进行注册

vi /etc/yum/pluginconf.d/subscription-manager.conf #enabled=1 

二、拷贝这三个安装包

三、安装三个包

1、使用以下命令一次性安装3个包

rpm -ivh yum-* 

2、检查是否安装成功

rpm -qa |grep yum 

四、配置repo文件

1、在linux中进入etc文件，备份yum.repos.d文件

cd /etc mv yum.repos.d yum.repos.d.bak mkdir yum.repos.d 

2、下载repo文件

wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo 

或者

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo 

3、修改下载好的repo文件

下载好的repo文件应该在etc/yum.repos.d目录下，里面应该也只有一个文件，直接vim 文件名

vim /etc/yum.repos.d/CentOS-Base.repo 

 %s/$releasever/7/g 

替换完毕后，按Esc，然后 :wq 保存退出vim模式

2）-3）也可以手工放入

# 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-7 - Base - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/7/os/$basearch/ http://mirrors.aliyuncs.com/centos/7/os/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/7/os/$basearch/ gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 #released updates  [updates] name=CentOS-7 - Updates - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/7/updates/$basearch/ http://mirrors.aliyuncs.com/centos/7/updates/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/7/updates/$basearch/ gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 #additional packages that may be useful [extras] name=CentOS-7 - Extras - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/7/extras/$basearch/ http://mirrors.aliyuncs.com/centos/7/extras/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/7/extras/$basearch/ gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 #additional packages that extend functionality of existing packages [centosplus] name=CentOS-7 - Plus - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/7/centosplus/$basearch/ http://mirrors.aliyuncs.com/centos/7/centosplus/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/7/centosplus/$basearch/ gpgcheck=1 enabled=0 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 #contrib - packages by Centos Users [contrib] name=CentOS-7 - Contrib - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/7/contrib/$basearch/ http://mirrors.aliyuncs.com/centos/7/contrib/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/7/contrib/$basearch/ gpgcheck=1 enabled=0 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 

4、清除缓存

yum clean all 

5、重新生成缓存

yum makecache 

6、yum 更新

yum update yum clean all && yum makecache && yum update