Redhat7 更换 centos7 yum源

错误描述

This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register. 

解决步骤

删除redhat原有的yum

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

下载yum安装文件

#到这个网站去下载以下RPM包
http://mirrors.163.com/centos/7/os/x86_64/Packages/

wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-3.4.3-163.el7.centos.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
ll

进行安装yum

rpm -ivh --force --nodeps python-iniparse-0.4-9.el7.noarch.rpm; rpm -ivh --force --nodeps yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
rpm -ivh --force --nodeps yum-3.4.3-163.el7.centos.noarch.rpm yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpm

注意:最后两个包必需同时安装，不然会相互依赖

设置源

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

清除原有缓存

yum clean all

重建缓存，以提升搜索安装软件的速度

yum makecache

若是有提示错误，运行下面的命令：[Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found" 

 

sed -i 's/\$releasever/7/' CentOS-Base.repo

 备注：把文件里的$releasever替换为7 最后：从新生成缓存，数字不为0，就OK了

yum clean all; yum makecache

更新系统

yum update