I have to make use of the "apt" command around the terminal. My network possess a domain and also the proxy need an authentication. I attempt using the enviroment variable http_proxy:

export http_proxy='http://DOMAINUSER:PASSWORD@IP_PROXY:PORT_PROXY/'

however the get wget world wide web.google.com does not work. I attempt also by setting up the file /etc/apt/apt.conf with similar syntax but does not work. Any ideas? Thx

wget doesn't support proxy authentication with any plan but Fundamental.

The answer is by using a proxy adaptor like ntlmaps.