centos8 --- Failed to download metadata for repo ‘AppStream’ [CentOS]

zhangxinhe

错误提示：
root@k ~]# yum updateCentOS-8 - AppStream 70 B/s | 38 B 00:00Error: Failed to download metadata for repo 'AppStream': Cannot prepare internal mirrorlist: No URLs in mirrorlist查看一下cat /var/log/dnf.log
2022-xx-02T11:39:36Z DEBUG error: Curl error (6): Couldn't resolve host name for http://mirrorlist.centos.org/?re ... pStream&infra=stock [Could not resolve host: mirrorlist.centos.org] (http://mirrorlist.centos.org/?re ... pStream&infra=stock).2022-xx-02T11:39:36Z WARNING Errors during downloading metadata for repository 'AppStream':- Curl error (6): Couldn't resolve host name for http://mirrorlist.centos.org/?re ... pStream&infra=stock [Could not resolve host: mirrorlist.centos.org]2022-xx-02T11:39:36Z DDEBUG Cleaning up.2022-xx-02T11:39:36Z SUBDEBUGTraceback (most recent call last):File "/usr/lib/python3.6/site-packages/dnf/repo.py", line 573, in loadret = self._repo.load()File "/usr/lib64/python3.6/site-packages/libdnf/repo.py", line 394, in loadreturn _repo.Repo_load(self)RuntimeError: Failed to download metadata for repo 'AppStream': Cannot prepare internal mirrorlist: Curl error (6): Couldn't resolve host name for http://mirrorlist.centos.org/?re ... pStream&infra=stock [Could not resolve host: mirrorlist.centos.org]解决方案：

第一步：

[root@k ~]# cd /etc/yum.repos.d/
第二步：
[root@k ~]# sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
[root@k ~]# sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
第三步：
[root@k ~]# yum update -y处理完毕！