/etc/environment
http_proxy="http://<username>:<password>@<host>:<port>/"
ftp_proxy="ftp://<username>:<password>@<host>:<port>/";
https_proxy="https://<username>:<password>@<host>:<port>/";
no_proxy="localhost,127.0.0.1,localaddress,.localdomain.com"
HTTP_PROXY="http://<username>:<password>@<host>:<port>/"
FTP_PROXY="ftp://<username>:<password>@<host>:<port>/";
HTTPS_PROXY="https://<username>:<password>@<host>:<port>/";
NO_PROXY="localhost,127.0.0.1,localaddress,.localdomain.com"