edit system file

graphical provide us the drag and drop ways to deal with files.but cause of the user permission control ,it always disappoint you.for example:u wanna move a file from /media/windowpartion to / .in command line ,it is no big deal .sudo mv /media/windowpartion / is enough.but if u wanna change graphically, maybe the popup alert will tell you: you request are denied. what we can do?
follow me :
if you are kde ,i mean ,kubuntu,type following command:
kdesudo konqueror
actually, here kongqueror is not a brower,but file manager system.now ,you can use it edit the file belongs to root.cause there is kdesudo when you run konqueror ,remenber?
if Ubuntu (Gnome)
gksudo nautilus
if dont take effect.type ATL+F2 and come into command mode,
then type:
gksudo nautilus
this would work
if Xubuntu (XFCE)
type :
gksudo thunar


at last but not least: Good luck!