Could not retrieve mirrorlist htt 去掉 p 去掉://mirrorlist 去掉 centos.去掉 org/?re ... repo=os&infra=stoc error was 14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error" http 去掉://mirror.centos.qu dorg/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirror.centos.org; Unknown error" Trying other mirror.
尝试在 etc/resolv.conf （用的是记事本打开添加，不是命令行）添加 nameserver:8.8.8.8 无法保存，不知到怎么处理了，求大神们指点指点。
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