centos8修改yum源
标签（空格分隔）： yum
问题解决：Failed to download metadata for repo ‘appstream‘: Cannot prepare internal mirrorlist:...
大家都知道Centos8于2021年年底停止了服务，大家再在使用yum源安装时候，出现下面错误
Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist
- 进入yum的repos目录
cd /etc/yum.repos.d
- 修改所有的CentOS文件内容
sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
- 更新yum源为阿里镜像
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
yum clean all
yum makecache
- yum安装测试是否可以yum安装
yum install -y python36 python38