Temporary failure in name resolution 错误解决方法:
vim /etc/resolv.conf
将里面的 nameserver 注释掉，尝试填写以下内容到文件中:
nameserver 114.114.114.114
nameserver 8.8.8.8
can not resovle host xxx 错误解决方法:
修改 /etc/hosts
sudo vim /etc/hosts
127.0.0.1 localhost
127.0.0.1 <your hostname>