The reason that the "terminal" appears to be broken to you while the browser works fine is that your DNS is not configured or misconfigured. When the browser uses a proxy it does not do dns resolution locally, the proxy server does. But your 'apt-get update' is not using the proxy.
Please give some more information on what exactly you did to: "configured proxy and static IP" Did you use network-manager? Did you edit files in /etc/ ? After supplying that information, please move this bug back to 'New' status. ** Changed in: nplan (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1725353 Title: Could not resolve 'archive.ubuntu.com' while proxy setting in Network Manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nplan/+bug/1725353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs