trouble in sudo apt-get update
 

Hi,

I have just installed Ubuntu 10.10...when I type in sudo apt-get update in the terminal, it flags an error 407: Proxy Authentication Required. My internet connection requires a proxy authentication, that I have already provided (and I'm able to connect to the net via a web browser). I have also configured the proxy in Synaptic...the error message still remains the same.

sudo apt-get install build-essential says E: unable to locate package build-essential.... I need these two commands to get started...please help.

Hi -

There are several approaches.

1. One is to edit your proxy and authentication info into "/etc/apt/apt.conf":
2. Another approach is to set the environment variable "http_proxy":

In case the above two links don't solve the problem you can download ntlmaps from
http://sourceforge.net/projects/ntlmaps/

and try out the steps given here
http://ubuntuforums.org/showthread.php?t=765330

you might need to issue

sudo -E apt-get install ....

so that sudo reads environment variables first which you must set up in advance (typically during installation).