I installed Ubuntu in my work.
During Setup, There is a window which showing "At least 4.4 GB space is needed" and "Connected to Ethernet".
The strange thing is, once i plug the patch cable the check mark becomes Green checkmark and after a few seconds its showing gray cross.
I ignored it and coninued then it is successfully installed.
Once i logged into Ubuntu, i changed the proxy in firefox and i can connect to websites without any problem.
Now my problem is, although i can access to websites but when i wanted to install updates from bash Ubuntu cannot connect as shown in the screen shot.
When i tried to download Evoluion for the E-mail from Software Center, the same thing it doesn't start downloading as shown in the screen shot.
Note: we already have a windows domain at work.
Thank you for any help.
Screenshot from 2013-09-10 13:00:06.jpgScreenshot from 2013-09-10 13:02:00.jpgScreenshot from 2013-09-10 13:05:00.jpg