Somehow I can not access my desktop and have access to command-line. I can ONLY see wallpaper after login (no icons), I think I messed up with lightdm. Other posts suggests that I can reconfigure it or reinstall it by accessing Terminal(Ctrl+ Alt+ F1) and here comes the main problem:
I am using University's network for accessing internet, which requires proxy setting and authentication. Earlier for updating Ubuntu I use to set no-proxy in Firefox and then apt-get, but now I can not access Firefox itself. In addition to no-proxy, University have many other proxy options. I tried to set a few of the alternate proxies through:
http_proxy=http://username:password@proxyhost:port
pinging google.com results in no connection (100% loss), but I can successfully ping the proxy server. I don't know how to connect through no-proxy in Terminal. Can any one suggest me how to bring back the display manager or to manage the proxy setting? Thanks.
sudo dpkg-reconfigure -a, but then there is this error:Unknown option: a– pkj Mar 14 '15 at 06:03sudo apt-get -o Acquire::http::Proxy=<host> updateto use proxy<host>orsudo apt-get -o Acquire::http::Proxy=false updateto use a direct (non-proxied) connection. See cannot update unless on one network orman apt.conffor details. – steeldriver Mar 14 '15 at 12:53