Possible Duplicate:
How to use apt-get/synaptic behind a proxy?
I'm using Ubuntu version 11.04 I live in a university and we have to give our proxy userid to obtain any internet access.
I've given my proxy details in System Settings -> Network Proxy Mozilla Firefox works ok and I can access the internet just fine but now when I try to update it'll ask me to authenticate. In Ubuntu 10.04 when I faced this very same problem I just changed a few settings in the Administration Preferences along with the network proxy. Although now I cannot find the area for administration pref.
In Ubuntu 11.04 do I need to give the proxy settings in another area other than the network proxy for an update? I've also changed the Synaptic Package Manger settings but an error is displayed. The error is:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/main/binary-i386/Packages 407 Proxy Authentication Required
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/restricted/binary-i386/Packages 407 Proxy Authentication Required
, E:Some index files failed to download. They have been ignored, or old ones used instead.
Any help would be greatly appreciated. Thanks!
