hi there if just installed the latest ubuntu "Breezy Badger". i think i have messed up the whole system. what i did was that in the synaptic package manager i enabled the universe repositories and i havn't installed modem drivers so when i restarted the system it gave the following error occured

" could not look up internet address for . this will prevent GNOME from operating correctly.it may be possible to correct the problem by adding to the file /etc/hosts."

and now all the system admin programs aren'e working plz help.