Centos 8 配置yum源

背景

Linux服务器CentOS 8版本操作系统执行宝塔安装命令报错如下图：

Error: Failed to download metadata for repo 'epel'

Errors during downloading metadata for repository 'epel':
- Status code: 404 for http://archives.fedoraproject.org/pub/archive/epel/8/Everything/x86_64/repodata/repomd.xml (IP: 38.145.60.24)
Error: Failed to download metadata for repo 'epel': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried

原因：第三方的镜像站中均已移除CentOS 8的源，Centos 8版本已停止更新相应依赖导致的，下载新的yum源即可搞定。

备份yum源

mv /etc/yum.repos.d /etc/yum.repos.d.bak

新建yum源

mkdir -p /etc/yum.repos.d

curl https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo > /etc/yum.repos.d/Centos-vault-8.5.2111.repo

curl https://mirrors.aliyun.com/repo/epel-archive-8.repo > /etc/yum.repos.d/epel-archive-8.repo

清除缓存

yum clean all

yum makecache

安装软件

yum -y install python-devel

如果上面这个命令不成功，则执行下面这个：

yum install python36-devel