I am using Ubuntu 11.04 desktop edition mahcine. This machine is behind proxy server and content filter. I tried adding the following parameter in /etc/apt/apt.conf but it was not working after adding the ubuntu.com and the sites which are there in the sourcelist to content filter it started resolving the repo.
export http_proxy=http://username:password@proxyserver.net:port/
Now, the problem is the repo domains are resolving by doing apt-get update but not updating it.
Please help me.... Really this sucks.. I am finding this problem from last 2weeks... Please help....