1.修改 vim /etc/yum.repos.d/CentOS-Base.repo 文件

将mirrorlist配置注释掉，并将baseurl修改为阿里云镜像地址

[BaseOS]
name=CentOS-$releasever - Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=BaseOS&infra=$infra
baseurl=https://mirrors.aliyun.com/centos/$releasever-stream/BaseOS/$basearch/os/
http://mirrors.aliyuncs.com/centos/$releasever-stream/BaseOS/$basearch/os/
http://mirrors.cloud.aliyuncs.com/centos/$releasever-stream/BaseOS/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

2.修改 vim /etc/yum.repos.d/CentOS-AppStream.repo 文件

将mirrorlist配置注释掉，并将baseurl修改为阿里云镜像地址

[AppStream]
name=CentOS-$releasever - AppStream
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=AppStream&infra=$infra
baseurl=https://mirrors.aliyun.com/centos/$releasever-stream/AppStream/$basearch/os/
http://mirrors.aliyuncs.com/centos/$releasever-stream/AppStream/$basearch/os/
http://mirrors.cloud.aliyuncs.com/centos/$releasever-stream/AppStream/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

3.修改 vim /etc/yum.repos.d/CentOS-Extras.repo 文件
将mirrorlist配置注释掉，并将baseurl修改为阿里云镜像地址

[extras]
name=CentOS-$releasever - Extras
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
baseurl=https://mirrors.aliyun.com/centos/$releasever-stream/extras/$basearch/os/
http://mirrors.aliyuncs.com/centos/$releasever-stream/extras/$basearch/os/
http://mirrors.cloud.aliyuncs.com/centos/$releasever-stream/extras/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

首先执行yum clean all命令清除元数据

然后执行yum makecache命令重新加载元数据