1.解決方法
進入：vim /etc/resolv.conf
修改成：
ptions timeout:2 attempts:3 rotate single-request-reopen
; generated by /usr/sbin/dhclient-script
nameserver 100.100.2.136
nameserver 100.100.2.138
nameserver 8.8.8.8
nameserver 8.8.4.4
search localdomain
Could not resolve host: mirrors.cloud.aliyuncs.com; Unknown error"
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could not resolve host:mirrors.cloud.aliyuncs.com;Unknown error----使用 yum安裝的時候
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.cloud.aliyuncs.com; Unknown error" Trying other mirror.問題解決
[Errno 14] curl#6 - "Could not resolve host: mirrors.cloud.aliyuncs.com; Name or service not known"
YUM安裝軟件提示[Errno 14] curl#6 - "Could not resolve host: mirrors.cloud.aliyuncs.com; 未知的錯誤"
【完美解決】【Centos8】Linux 為 repo ‘AppStream‘ 下載元數據失敗、Could not resolve host: mirrors.cloud.aliyuncs.com
使用yum安裝服務報錯：[Errno 14] curl#6 - "Could not resolve host: mirrors.cloud.aliyuncs.com; Name or service not known"
Failed connect to mirrors.cloud.aliyuncs.com:80; Connection refused
Failed connect to mirrors.cloud.aliyuncs.com:80
【CentOS7】yum安裝時出現錯誤[Errno 14] curl#6 - "Could not resolve host: mirrors.aliyuncs.com; Unknown e的解決辦法
curl: (6) Could not resolve host: mirrors.163.com; Unknown error 服務器上解析不了域名，換成ip可以