CentOS 更换源指南

备份原仓库配置文件：

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

下载新的 Repo 文件：

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

完成替换后执行：

yum clear all
yum makecache

备份原仓库配置文件：

cp /etc/yum.repos.d/CentOS-AppStream.repo /etc/yum.repos.d/CentOS-AppStream.repo_bak
cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo_bak
cp /etc/yum.repos.d/CentOS-Extras.repo /etc/yum.repos.d/CentOS-Extras.repo_bak

修改 CentOS-AppStream.repo 文件：

# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=AppStream&infra=$infra
baseurl=https://mirrors.aliyun.com/centos/$releasever/AppStream/$basearch/os/

修改 CentOS-Base.repo 文件：

# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=BaseOS&infra=$infra
baseurl=https://mirrors.aliyun.com/centos/$releasever/BaseOS/$basearch/os/

修改 CentOS-Extras.repo 文件：

# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
baseurl=https://mirrors.aliyun.com/centos/8.0.1905/extras/x86_64/os/

完成替换后执行：

dnf clear all
dnf makecache