环境准备
- RHEL7.6，已联网
一、查询已安装的yum
• rpm -qa | grep yum
二、使用root权限卸载已安装的yum源
rpm -qa | grep yum | xargs rpm -e --nodeps
三、下载并安装阿里的yum源rpm包
# 创建安放rpm包的文件夹
cd /etc/yum.repos.d/
mkdir yum-rpm && cd yum-rpm
# 下载rpm包
wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-3.4.3-163.el7.centos.noarch.rpm
wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpm
wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-utils-1.1.31-52.el7.noarch.rpm
wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/python-urlgrabber-3.10-9.el7.noarch.rpm
如果失效，请在阿里云CentOS-yum源库寻找最新的rpm包
四、安装rpm包
cd /etc/yum.repos.d/yum-rpm
rpm -ivh *.rpm --force --nodeps
五、下载阿里镜像到/etc/yum.repos.d/目录下
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
六、修改Centos-7.repo文件将所有$releasever替换为7
vim /etc/yum.repos.d/CentOS-Base.repo
:%s/$releasever/7/g
七、运行以下命令
yum clean all
yum makecache
yum update
