Originally Posted by
linux 
Now, for the network file. I can't modify this in gedit and save it. It is readonly. Is there a way to change this?
The only reason it's readonly is because it's in the /etc branch of your filetree, which requires admin privaleges to do anything in there. In fact, almost anywhere other than your home folder on a *nix filesystem requires root privalges. So, you'll need to open Gedit like this on a command line:
su
[enter password; it won't be visible onscreen]
gedit /etc/sysconfig/network
Now do your editing and try to save. It should work.
"Technological progress is like an axe in the hands of a pathological criminal."