I recently installed Knoppix onto one of my machines. It was successful. Im really new to linux im curious about root privileges. I realized that in /etc/apt/sources.lst there are specific updates. I wanted to add the deb and deb-src for a Wine HQ install. When i open the file in kedit and add the lines that works great, but when i try to save it a message pops up and tells me either i dont have the privileges or i dont have enough space. Space isn't the issue.

Basically im trying to ask, is there a way to give yourself full root access using the GUI without using the shell?
Or, if there isnt a way, how do i open source.lst in a text editor from the shell once im logged in as root?

I did try typing "nano /etc/apt/sources.lst" but it doesnt recognize the command.
Is there a shell command for kedit? or any other text editor?