Fixing Shell for Root user
Since I have recently changed to the Fish Shell, I had used chsh to change it for my main user account. When I su'd later I realized I hadn't changed it here, so I did it again. However, I apparently typed in the wrong path (I guess I should have gone ahead and done cat /etc/shells again). Now whenever I try to su it simply says "No shell".
I know there is a file for this some where as I have come across it before but I cannot seem to find it. How can I change the default shell? I also am not in the sudoers file so I can't exactly use sudo (help appreciated there) but I believe I can access root by using Ctrl+Alt+F1 and logging in there.