Could not resolve hostname : Name or service not known

问题:Could not resolve hostname : Name or service not known

回答: 当出现"Could not resolve hostname : Name or service not known"错误时，表示系统无法解析主机名或服务名。解决此问题的方法有两种。一种是根据网络配置文件生成/etc/resolv.conf文件，可以使用systemctl restart NetworkManager命令来自动生成。在CentOS 7中，默认的网络配置文件是/etc/sysconfig/network-scripts/ifcfg-eth0。然而，如果你的网卡配置文件不是ifcfg-eth0，而是ifcfg-ens33等其他文件，你可以直接在/etc/resolv.conf中手动添加正确的DNS信息。这样就可以解决"Could not resolve hostname : Name or service not known"错误。<span class="em">1</span><span class="em">2</span>
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