I recently installed Ubuntu 12.10,but during installation I ignored update software package.after installing Ubuntu successfully now whenever I'm updating through software updater it is showing failed to download repository information. I'm having proxy server wifi connection. please help me to overcome the problem. Thank you
To set your proxy settings, click on the gear icon on the top-right corner of your screen. Click on "System Settings" and then on Network. You can see the "Network Proxy" button to your letf. Change the "method" to "Manual" and type the proxy-address and port-no for all the relevant fields(HTTP proxy, HTTPS proxy, FTP proxy and socks proxy).
If you need to authenticate your login, i.e. you need to add a user-name and password, you need to edit the
etc/apt/apt.conf file as given in the answer by user17823 here.
I have made a script to do this. You can download this from my blog.
This should set the proxy settings and now you should be able to use your internet to download packages.