CentOS8 yum/dnf 配置国内源的方法

配置CentOS 8的yum/dnf源可以提高软件包下载速度和稳定性。以下是步骤：

在修改前，首先进行仓库备份，以便于回滚操作。

sudo cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak

清空原有仓库的所有内容。

sudo echo "" > /etc/yum.repos.d/CentOS-Base.repo

编辑CentOS-Base.repo，输入以下内容保存。

sudo vi /etc/yum.repos.d/CentOS-Base.repo

[BaseOS]
name=CentOS-$releasever - Base - aliyun
baseurl=https://mirrors.aliyun.com/centos/$releasever/BaseOS/$basearch/os/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official

[updates]
name=CentOS-$releasever - Updates - aliyun
baseurl=https://mirrors.aliyun.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official

[extras]
name=CentOS-$releasever - Extras - aliyun
baseurl=https://mirrors.aliyun.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official

再次备份阿里云源的repo。

sudo cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.aliyun

以上操作后，重启yum/dnf即可使用阿里云源，例如：

sudo dnf upgrade

另外，以下为清华大学的CentOS8源示例：

• CentOS 8 BaseOS

[BaseOS]
name=CentOS-$releasever - Base
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/BaseOS/$basearch/os/
gpgcheck=0
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-Official

• CentOS 8 AppStream

[AppStream]
name=CentOS-$releasever - AppStream
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/AppStream/$basearch/os/
gpgcheck=0
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-Official

注意：以上示例为各仓库的基本配置，如需添加其他第三方源请自行搜索。