解决Centos8的yum源报错：Error: Failed to download metadata for repo ‘appstream’: Cannot prepare internal mirrorlist: No URLs in mirrorlist

今天安装centos8之后执行yum makecache后报错了

[root@localhost ~]# yum makecache
Failed to set locale, defaulting to C.UTF-8
CentOS Linux 8 - AppStream                       43  B/s |  38  B     00:00
Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist

通过网上查阅资料后得知：

然后找到解决方法，本人亲测有效

sudo sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
sudo sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*

这里建议先备份一下yum.repos.d这个目录

替换完以后接下来就可以加载缓存信息了

yum makecache

这下就没有再报错了