#/.bashrc export http_proxy=http://username:password@proxy_server:proxy_port/
#/etc/apt/apt.conf.d/30proxy Acquire::http::Proxy "http://username:password@proxy_server:proxy_port/";
sudo apt-get update
#/.bashrc export http_proxy=http://username:password@proxy_server:proxy_port/
#/etc/apt/apt.conf.d/30proxy Acquire::http::Proxy "http://username:password@proxy_server:proxy_port/";
sudo apt-get update