When using sudo apt-get update behind a proxy you must do visudo Defaults env_keep = “http_proxy https_proxy ftp_proxy DISPLAY XAUTHORITY”
sudoers howto
How to Sudoers Syntax: usernames/group servername = (usernames command can be run as) command There are some general guidelines when editing this file: Groups are the same as user groups and are differentiated from regular users by a % at […]