Linux 安装yum报错Could not resolve host 转载

Linux 安装yum报错Could not resolve host

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http://update.cs2c.com.cn:8080/NS/V7/V7Update4/os/adv/lic/base/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - “Could not resolve host: update.cs2c.com.cn; 未知的错误”
正在尝试其它镜像。

One of the configured repositories failed (NeoKylin Linux Advanced Server 7 - Os),
and yum doesn’t have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work “fix” this:

 1. Contact the upstream for the repository and get them to fix the problem.2. Reconfigure the baseurl/etc. for the repository, to point to a workingupstream. This is most often useful if you are using a newerdistribution release than is supported by the repository (and thepackages for the previous distribution release still work).3. Run the command with the repository temporarily disabledyum --disablerepo=ns7-adv-os ...4. Disable the repository permanently, so yum won't use it by default. Yumwill then just ignore the repository until you permanently enable itagain or use --enablerepo for temporary usage:yum-config-manager --disable ns7-adv-osorsubscription-manager repos --disable=ns7-adv-os5. Configure the failing repository to be skipped, if it is unavailable.Note that yum will try to contact the repo. when it runs most commands,so will have to try and fail each time (and thus. yum will be be muchslower). If it is a very temporary problem though, this is often a nicecompromise:yum-config-manager --save --setopt=ns7-adv-os.skip_if_unavailable=true

failure: repodata/repomd.xml from ns7-adv-os: [Errno 256] No more mirrors to try.
http://update.cs2c.com.cn:8080/NS/V7/V7Update4/os/adv/lic/base/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - “Could not resolve host: update.cs2c.com.cn; 未知的错误”

解决办法：在/etc/resolv.conf文件中添加：nameserver 8.8.8.8

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