apt-get代理

linux服务器无法连接外网时，需要通过代理连接外网，
设置方式：修改/etc/apt/apt.conf，

Acquire::http::proxy "http://10.251.210.xx:808/";
Acquire::ftp::proxy "ftp://10.251.210.xx:808/";
Acquire::https::proxy "https://10.251.210.xx:808/";

参考：链接