CentOS 8更改了软件包的安装程序，取消了 yum 的配置方法，改而使用了dnf 作为安装程序。虽然改变了软件包的安装方式，但是 dnf 还是能兼容使用 yum 的配置文件的和命令的使用方法的。

这里也就不过多讲解了，直接上文件：

# file: /etc/yum.repos.d/CentOS-AppStream.repo

[AppStream]
name=CentOS-$releasever - AppStream
baseurl=http://mirrors.aliyun.com/centos/$releasever/AppStream/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

 

# file: /etc/yum.repos.d/CentOS-Base.repo

[BaseOS]
name=CentOS-$releasever - Base
baseurl=http://mirrors.aliyun.com/centos/$releasever/BaseOS/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

# file: /etc/yum.repos.d/CentOS-Epel.repo

[epel]
name=CentOS-$releasever - Epel
baseurl=http://mirrors.aliyun.com/epel/8/Everything/$basearch
enabled=1
gpgcheck=0

# file: /etc/yum.repos.d/CentOS-Media.repo

[c8-media-BaseOS]
name=CentOS-BaseOS-$releasever - Media
baseurl=file:///media/CentOS/BaseOS/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
[c8-media-AppStream]
name=CentOS-AppStream-$releasever - Media
baseurl=file:///media/CentOS/AppStream/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

注：CentOS-Media 配置需要将光盘挂载至/media/CentOS路径，否则在使用时会报错。

然后执行如下命令：

dnf clean all    # 清除所有的缓存文件
dnf makecache    # 制作元数据缓存

Get阿里的repo文件

 

阿里云Base地址:https://developer.aliyun.com/mirror/centos?spm=a2c6h.13651102.0.0.3e221b11XmE64J

 

1. 备份

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

 

2.下载(CentOS 8)新的 CentOS-Base.repo 到 /etc/yum.repos.d/

 

wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-8.repo

或者

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-8.repo

 EPEL

1. 备份(如有配置其他epel源)

mv /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.backup
mv /etc/yum.repos.d/epel-testing.repo /etc/yum.repos.d/epel-testing.repo.backup

2. 下载新repo 到/etc/yum.repos.d/

epel(RHEL 8)
1）安装 epel 配置包

yum install -y https://mirrors.aliyun.com/epel/epel-release-latest-8.noarch.rpm

2）将 repo 配置中的地址替换为阿里云镜像站地址

sed -i 's|^#baseurl=https://download.fedoraproject.org/pub|baseurl=https://mirrors.aliyun.com|' /etc/yum.repos.d/epel*
sed -i 's|^metalink|#metalink|' /etc/yum.repos.d/epel*

如果没有epql.repo文件，vim新增一个ql.repo文件即可，配置如下

# file: /etc/yum.repos.d/CentOS-Epel.repo
 
[epel]
name=CentOS-$releasever - Epel
baseurl=http://mirrors.aliyun.com/epel/8/Everything/$basearch
enabled=1
gpgcheck=0