VirtualBox下虚拟机Ubuntu18.04浏览器可以用proxy上网，terminal不可以连网

VirtualBox下虚拟机Ubuntu18.04浏览器可以用proxy上网，terminal不可以连网

https://stackoverflow.com/questions/41502868/how-to-set-proxy-for-terminal-in-ubuntu

/etc/apt/apt.conf

Acquire::http::proxy "http://ProxyHOST:ProxyPORT/"; Acquire::https::proxy "https://ProxyHOST:ProxyPORT/";