[[category:IS]]

====== CentOS 更换源指南 ======

===== CentOS 7 更换源 =====

**备份原仓库配置文件**：
<code bash>
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
</code>

**下载新的 Repo 文件**：
<code bash>
wget -O /etc/yum.repos.d/CentOS-Base.repo [[http://mirrors.aliyun.com/repo/Centos-7.repo]]
</code>

**完成替换后执行**：
<code bash>
yum clear all
yum makecache
</code>

===== CentOS 8 更换源 =====

**备份原仓库配置文件**：
<code bash>
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
</code>

**修改 CentOS-AppStream.repo 文件**：
<code bash>
# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=AppStream&infra=$infra
baseurl=https://mirrors.aliyun.com/centos/$releasever/AppStream/$basearch/os/
</code>

**修改 CentOS-Base.repo 文件**：
<code bash>
# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=BaseOS&infra=$infra
baseurl=https://mirrors.aliyun.com/centos/$releasever/BaseOS/$basearch/os/
</code>

**修改 CentOS-Extras.repo 文件**：
<code bash>
# 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/
</code>

**完成替换后执行**：
<code bash>
dnf clear all
dnf makecache
</code>