Justterrible wrote: > Must have a syntax error. I get: > > > Code: > peter@peter-desktop:/etc/apt$ sudo edit sources.list > Warning: unknown mime-type for "sources.list" -- using "application/*" > > > > > So how do I tell it to use application 'sources.list' or whatever it needs to edit it? > > Thanks Try with : Code: gksudo gedit /etc/apt/sources.list It will start gedit (gnome editor) with root privilege (given graphically by gksudo)