cn.codeaurora.org: 域名解析暂时失败原因是/etc/resolv.conf没有配置DNS
1，/etc/resolv.conf 如果只有如下显示：
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.1.1
只有这个说明nameserver配置有问题，需要根据当前服务器设置更新这个文件
2，nmcli dev show 也可以直接查找DNS 关键词
可以看到当前配置IP4.DNS[1]: 219.146.0.130
#老系统为nm-tool
3，sudo vi /etc/resolv.conf 编辑添加DNS服务器
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.1.1
nameserver 219.146.0.130